US Bank Directory
Banks in Watertown, SD
9 FDIC-insured banks operate 12 offices in Watertown, South Dakota, and 4 credit unions have 4 offices.
Source: FDIC BankFind, data as of September 5, 2026; NCUA call report as of March 31, 2026; hours checked October 10, 2026.
Bank branch map: Watertown
Banks sit at the coordinates in their FDIC record; credit union offices at their NCUA address, located with the U.S. Census Bureau Geocoder. Point at a marker for today's hours, tap it for the address, directions and the bank's site.
Short answer: 13 banks and credit unions operate 16 locations in Watertown, according to the FDIC and the NCUA. 16 of them have coordinates on record and are on the map. 7 publish opening hours.
Branches: FDIC, NCUA. Streets: loading.
16 locations on the map
Tap a cluster to zoom in
Positions are the regulators' own coordinates, or the Census Geocoder's point for the address, and can sit a few hundred feet from the door. Streets, buildings and parks come from OpenStreetMap through OpenFreeMap, with every street named as you zoom in; if that map cannot load, a simpler map drawn from the Census Bureau's TIGER/Line files takes its place. ATMs will follow with the Overture Maps import.
All banks and credit unions in Watertown
Sorted by number of local branches. Each branch shows where its hours and phone number come from.
Short answer: First Interstate Bank, First PREMIER Bank and Reliabank Dakota have the most locations in Watertown, with 2 each. 6 banks have a single office in the city. Open any bank to see each address, today's hours where the bank publishes them and the phone number.
First Interstate Bank Bank · 2
First Interstate Bank has 2 branches in Watertown, 46 across South Dakota and 274 nationwide. FDIC records list its main office in Billings, MT and show it operating since 1916. With $25.79 billion in total assets on June 30, 2026, it ranks No. 83 of 4,232 U.S. banks by total assets. In FDIC branch records, its longest-running Watertown location is the Watertown 5Th St. S.E. Branch at 624 5th St Se, dating to 1980; the newest, at 35 1st Ave Ne, to 2017. None of its 2 Watertown locations with published hours lists Saturday hours.
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Watertown Uptown Branch35 1st Ave Ne, 57201
All hours
Mon closed; Tue to Fri 9 am to 5 pm; Sat to Sun closed
Hours: First Interstate Bank branch locator (All The Places), checked Oct 10, 2026
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Watertown 5Th St. S.E. Branch624 5th St Se, 57201
All hours
Mon closed; Tue to Fri 9 am to 5 pm; Sat to Sun closed
Hours: First Interstate Bank branch locator (All The Places), checked Oct 10, 2026
First PREMIER Bank Bank · 2
First PREMIER Bank has 2 branches in Watertown, 13 across South Dakota and 13 nationwide. FDIC records list its main office in Sioux Falls, SD and show it operating since 1914. With $3.64 billion in total assets on June 30, 2026, it ranks No. 361 of 4,232 U.S. banks by total assets. In FDIC branch records, its longest-running Watertown location is the Watertown Branch at 24 5th St Se, dating to 1902; the newest, at 824 34th St Se, to 2001. It does not publish hours in the sources this page uses; check its site before you go.
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Watertown Branch24 5th St Se, 57201
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Watertown I29 Branch824 34th St Se, 57201
Reliabank Dakota Bank · 2
Reliabank Dakota has 2 branches in Watertown, 10 across South Dakota and 10 nationwide. FDIC records list its main office in Estelline, SD and show it operating since 1920. With $788.4 million in total assets on June 30, 2026, it ranks No. 1,275 of 4,232 U.S. banks by total assets. In FDIC branch records, its longest-running Watertown location is the Watertown Branch at 1401 4th St Ne, dating to 1997; the newest, at 830 10th St Sw, to 2002. It does not publish hours in the sources this page uses; check its site before you go.
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Watertown Branch1401 4th St Ne, 57201
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Watertown Sw Branch830 10th St Sw, 57201
American Bank & Trust Bank · 1
American Bank & Trust has 1 branch in Watertown, 18 across South Dakota and 20 nationwide. FDIC records list its main office in Sioux Falls, SD and show it operating since 1892. With $2.25 billion in total assets on June 30, 2026, it ranks No. 555 of 4,232 U.S. banks by total assets. The Watertown Branch at 1715 1st Ave Ne dates to 2023 in FDIC branch records. It does not publish hours in the sources this page uses; check its site before you go.
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Watertown Branch1715 1st Ave Ne, 57201
Area Credit Union Credit union · 1
Area Credit Union has 1 office in Watertown, 2 across South Dakota. It is based in Aberdeen, SD and $200.2 million in assets on March 31, 2026, according to its NCUA call report. Its published hours do not list Saturday.
Who can join: see the credit union's site.
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Watertown Temporary Branch113 1St Ave Nw, 57201
All hours
Mon to Fri 9 am to 5 pm; Sat to Sun not published
Hours: NCUA, March 31, 2026
Avanti Credit Union Credit union · 1
Avanti Credit Union has 1 office in Watertown, 1 across South Dakota. It is based in Watertown, SD and $31.8 million in assets on March 31, 2026, according to its NCUA call report. Its published hours do not list Saturday.
Who can join: see the credit union's site.
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Main Office main office1620 4Th St Ne, 57201
All hours
Mon to Fri 7:30 am to 5:30 pm; Sat to Sun not published
Hours: NCUA, March 31, 2026
Cornerstone Bank Bank · 1
Cornerstone Bank has 1 branch in Watertown, 3 across South Dakota and 13 nationwide. FDIC records list its main office in Fargo, ND and show it operating since 1907. With $1.85 billion in total assets on June 30, 2026, it ranks No. 639 of 4,232 U.S. banks by total assets. The Watertown Branch at 104 1st Ave Nw dates to 2026 in FDIC branch records. It does not publish hours in the sources this page uses; check its site before you go.
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Watertown Branch104 1st Ave Nw, 57201
Dacotah Bank Bank · 1
Dacotah Bank has 1 branch in Watertown, 21 across South Dakota and 32 nationwide. FDIC records list its main office in Aberdeen, SD and show it operating since 1955. With $4.92 billion in total assets on June 30, 2026, it ranks No. 292 of 4,232 U.S. banks by total assets. The Watertown Branch at 1310 9th Ave Se dates to 1991 in FDIC branch records. It does not publish hours in the sources this page uses; check its site before you go.
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Watertown Branch1310 9th Ave Se, 57201
Dakotaland Credit Union Credit union · 1
Dakotaland Credit Union has 1 office in Watertown, 13 across South Dakota. It is based in Huron, SD and $739.6 million in assets on March 31, 2026, according to its NCUA call report. Its published hours do not list Saturday.
Who can join: see the credit union's site.
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Watertown Branch1101 9Th Ave Se, 57201
All hours
Mon to Fri 9 am to 4 pm; Sat to Sun not published
Hours: NCUA, March 31, 2026
First Bank & Trust Bank · 1
First Bank & Trust has 1 branch in Watertown, 15 across South Dakota and 22 nationwide. FDIC records list its main office in Brookings, SD and show it operating since 1925. With $4.78 billion in total assets on June 30, 2026, it ranks No. 296 of 4,232 U.S. banks by total assets. The Watertown Branch at 1120 9th Ave Se dates to 2002 in FDIC branch records. It does not publish hours in the sources this page uses; check its site before you go.
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Watertown Branch1120 9th Ave Se, 57201
Plains Commerce Bank Bank · 1
Plains Commerce Bank has 1 branch in Watertown, 8 across South Dakota and 8 nationwide. FDIC records list its main office in Sioux Falls, SD and show it operating since 1931. With $1.30 billion in total assets on June 30, 2026, it ranks No. 848 of 4,232 U.S. banks by total assets. The Watertown Branch at 109 1st Ave Se dates to 1934 in FDIC branch records. It does not publish hours in the sources this page uses; check its site before you go.
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Watertown Branch109 1st Ave Se, 57201
Sioux Valley Coop Credit Union Credit union · 1
Sioux Valley Coop Credit Union has 1 office in Watertown, 1 across South Dakota. It is based in Watertown, SD and $41.5 million in assets on March 31, 2026, according to its NCUA call report. Its published hours do not list Saturday.
Who can join: see the credit union's site.
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Main Office main office712 9Th Ave Se, 57201
All hours
Mon to Fri 9 am to 5 pm; Sat to Sun not published
Hours: NCUA, March 31, 2026
Wells Fargo Bank · 1
Wells Fargo has 1 branch in Watertown, 30 across South Dakota and 4,161 nationwide. FDIC records list its main office in Sioux Falls, SD and show it operating since 1870. With $1.91 trillion in total assets on June 30, 2026, it ranks No. 4 of 4,232 U.S. banks by total assets. The Watertown East 212 Branch at 1225 9th Ave Se dates to 1979 in FDIC branch records. It opens on Saturday.
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Watertown East 212 Branch1225 9th Ave Se, 57201
All hours
Mon to Fri 9 am to 5 pm; Sat 9 am to 2 pm; Sun not published
Hours: Wells Fargo branch locator (All The Places), checked Oct 10, 2026
Join a credit union in Watertown
4 credit unions have 4 offices here: Dakotaland Credit Union, Area Credit Union, Sioux Valley Coop Credit Union and Avanti Credit Union. Each office is listed above with the phone and the hours it filed with the NCUA (call report as of March 31, 2026). Who can join each one is on its own site; the credit unions in Watertown page has every office in the state's directory.
Banking in Watertown: the local picture
Short answer: 9 banks run 12 branches in Watertown according to the FDIC. A population estimate for this place is not available from the Census Bureau, so branches per resident are not shown.
Of the 9 banks, 0 have their main office in Watertown, 7 elsewhere in South Dakota and 2 out of state, according to the FDIC.
The bank with the longest record here is Wells Fargo, operating since 1870 according to the FDIC. In FDIC branch records, the longest-running branch is First PREMIER Bank's office at 24 5th St Se, dating to 1902; the newest is Cornerstone Bank's at 104 1st Ave Nw, from 2026.
4 credit unions have 4 offices in Watertown, according to the NCUA. Who can join each one is on the credit unions page.
Of the 7 locations with published hours. 1 opens on Saturday. 9 locations have no published hours in these sources.
Banks open on Saturday in Watertown
Short answer: 1 of the 7 Watertown locations with published hours opens on Saturday, run by 1 institution.
- Wells Fargo: 1 of 1 branch (1225 9th Ave Se: Saturday 9 am to 2 pm)
Credit union hours are the text each credit union filed with the NCUA, call report as of March 31, 2026; a day the filing does not mention is shown as not published, never as closed. Bank branches show hours only where the bank publishes them in a source this page uses; 9 of the 16 locations here have no published hours yet. The source and date sit under each office. Banks and credit unions often close on Federal Reserve holidays; call ahead.
Chase, Bank of America and other national banks
Which big national banks have branches in Watertown, and where the nearest one is if they do not.
Short answer: In Watertown: Wells Fargo (1). No branches in Watertown: Chase (nearest in Sioux Falls, 95 mi), Bank of America, PNC Bank, U.S. Bank (nearest in Aberdeen, 78 mi), Truist, Fifth Third Bank, Huntington, Regions Bank, TD Bank, BMO (nearest in Huron, 66 mi).
| Bank | In Watertown | Nearest branch if none here |
|---|---|---|
| Wells Fargo | 1 branch | here |
| Chase | None | Sioux Falls, 95 miles away |
| Bank of America | None | none in South Dakota |
| PNC Bank | None | none in South Dakota |
| U.S. Bank | None | Aberdeen, 78 miles away |
| Truist | None | none in South Dakota |
| Fifth Third Bank | None | none in South Dakota |
| Huntington | None | none in South Dakota |
| Regions Bank | None | none in South Dakota |
| TD Bank | None | none in South Dakota |
| BMO | None | Huron, 66 miles away |
Branch counts from FDIC BankFind as of September 5, 2026. Distances are straight-line miles from the center of Watertown to the nearest branch in South Dakota.
What your savings could earn
National benchmarks and the best published offers, from the Banrox Bank Rates tracker. Enter your own balance and rate to compare.
Short answer: At the national average savings rate of 0.38%, $10,000 kept in savings for a year earns about $38. The best published savings rate in the tracker, 3.75% at CIT Bank, earns about $375. The national average 12-month CD pays 1.71%.
| Offer | Bank | APY | Term | Minimum |
|---|---|---|---|---|
| Savings | CIT Bank | 3.75% | none | $5,000 |
| Savings | Barclays | 3.50% | none | $0 |
| Savings | Marcus by Goldman Sachs | 3.40% | none | $0 |
| CD | Synchrony Bank | 4.35% | 60 Months | $0 |
| CD | Marcus by Goldman Sachs | 4.35% | 24 Months | $500 |
| CD | American Express National Bank | 4.25% | 10 Months | $0 |
Rates are the banks' published APYs as tracked on the Banrox Bank Rates page, with the date next to each benchmark; they are not offers from Banrox and can change daily. Interest is before tax. The best offers are mostly online banks and are open to Watertown residents like anyone else.
Banks near Watertown
Nearby cities with at least two banks, by straight-line distance. Counts from FDIC BankFind.
Short answer: The closest towns with more choice are Castlewood (13 miles) and Milbank (32 miles). Brookings, 43 miles away, has the most banks nearby: 6.
| City | Distance | Banks | Branches |
|---|---|---|---|
| Banks in Castlewood, SD | 13 mi | 2 | 2 |
| Banks in Milbank, SD | 32 mi | 4 | 4 |
| Banks in Webster, SD | 36 mi | 3 | 3 |
| Banks in Arlington, SD | 37 mi | 2 | 2 |
| Banks in Brookings, SD | 43 mi | 6 | 9 |
| Banks in Sisseton, SD | 53 mi | 3 | 3 |
| Banks in Madison, SD | 61 mi | 5 | 5 |
| Banks in Flandreau, SD | 64 mi | 2 | 2 |
Bank branch openings and closings in Watertown
FDIC branch records, between September 5, 2025 and September 5, 2026.
Short answer: FDIC branch records show 1 branch opening in Watertown between September 5, 2025 and September 5, 2026.
| Date | Change | Bank | Address |
|---|---|---|---|
| May 11, 2026 | Opened | Cornerstone Bank | 104 1st Ave Nw, 57201 |
Effective dates as recorded in FDIC BankFind branch history. Closings and relocations are not tracked by the sources this page uses yet. Credit union offices are not included; the NCUA does not publish opening dates.
Banks and credit unions based in Watertown
Short answer: 2 institutions have their main office in Watertown: Sioux Valley Coop Credit Union and Avanti Credit Union.
| Institution | Type | Total assets, March 31, 2026 | Offices here |
|---|---|---|---|
| Sioux Valley Coop Credit Union | Credit union | $41.5 million | 1 |
| Avanti Credit Union | Credit union | $31.8 million | 1 |
Banks: FDIC BankFind (community-bank flag and assets). Credit unions: NCUA call report.
Largest banks in Watertown by total assets
Ranked by each bank's total assets on its FDIC balance sheet, which covers the whole bank, not only its Watertown offices.
Short answer: Wells Fargo is the largest bank with offices in Watertown, with $1.91 trillion in total assets on June 30, 2026, No. 4 among U.S. banks by total assets. First Interstate Bank is second with $25.79 billion. Local deposit shares will follow once the FDIC Summary of Deposits is imported.
| Bank | Total assets | Rank | Offices here | Main office |
|---|---|---|---|---|
| Wells Fargo | $1.91 trillion | No. 4 | 1 | Sioux Falls, SD |
| First Interstate Bank | $25.79 billion | No. 83 | 2 | Billings, MT |
| Dacotah Bank | $4.92 billion | No. 292 | 1 | Aberdeen, SD |
| First Bank & Trust | $4.78 billion | No. 296 | 1 | Brookings, SD |
| First PREMIER Bank | $3.64 billion | No. 361 | 2 | Sioux Falls, SD |
| American Bank & Trust | $2.25 billion | No. 555 | 1 | Sioux Falls, SD |
| Cornerstone Bank | $1.85 billion | No. 639 | 1 | Fargo, ND |
| Plains Commerce Bank | $1.30 billion | No. 848 | 1 | Sioux Falls, SD |
| Reliabank Dakota | $788.4 million | No. 1,275 | 2 | Estelline, SD |
Total assets and ranks from FDIC BankFind as of June 30, 2026. Rank is among active banks that report total assets to the FDIC.
Banks in Watertown: FAQ
How many banks are in Watertown, SD?
Watertown has 9 banks with 12 branches and 4 credit unions with 4 offices, according to FDIC data as of September 5, 2026 and NCUA data as of March 31, 2026.
Which bank has the most branches in Watertown?
First Interstate Bank, with 2. First PREMIER Bank has 2 and Reliabank Dakota has 2.
Is there a First Interstate Bank in Watertown, SD?
Yes. FDIC data lists 2 First Interstate Bank branches in Watertown as of September 5, 2026. Its branches are listed under First Interstate Bank above, with the address and directions for each.
Is there a First PREMIER Bank in Watertown, SD?
Yes. FDIC data lists 2 First PREMIER Bank branches in Watertown as of September 5, 2026. Its branches are listed under First PREMIER Bank above, with the address and directions for each.
Is there a Reliabank Dakota in Watertown, SD?
Yes. FDIC data lists 2 Reliabank Dakota branches in Watertown as of September 5, 2026. Its branches are listed under Reliabank Dakota above, with the address and directions for each.
Is there a Chase in Watertown, SD?
No. FDIC data lists no Chase branch in Watertown as of September 5, 2026. The nearest is in Sioux Falls, about 95 miles away in a straight line.
Which banks in Watertown are open on Saturday?
Wells Fargo publishes Saturday hours for one or more Watertown locations. The Saturday section above lists each one with its hours. 9 of the 16 locations here do not publish hours in the sources this page uses; call ahead.
Which banks are headquartered in Watertown?
Sioux Valley Coop Credit Union and Avanti Credit Union have their main office in Watertown, according to the FDIC and the NCUA.
What is the oldest bank in Watertown?
Wells Fargo has the longest record among banks with a branch here: the FDIC shows it operating since 1870.
Which credit unions can I join in Watertown?
Dakotaland Credit Union, Area Credit Union, Sioux Valley Coop Credit Union and Avanti Credit Union have offices in Watertown. Check each credit union's membership rules before you apply.
Did any bank branches open or close in Watertown in the past year?
FDIC branch records show 1 branch opening between September 5, 2025 and September 5, 2026. Closings and relocations are not tracked by the sources this page uses yet.
Where can I find more banks near Watertown?
Nearby cities with more banks include Castlewood, Milbank, Webster. Castlewood is 13 miles away with 2 banks.
How we build this page
Every figure above comes from one of these sources. Nothing is typed by hand, nothing is estimated.
| Data | Source | License | Updated | Data as of |
|---|---|---|---|---|
| FDIC-insured banks: branches, main offices, total assets, dates established | FDIC BankFind Suite API | Public data (U.S. government) | Monthly import | Sep 5, 2026 |
| Credit union offices, phones and hours as filed with the NCUA, total assets | NCUA call report data | Public data (U.S. government) | Quarterly import | Mar 31, 2026 |
| Map coordinates of 4 credit union offices whose NCUA record has none, from the office address | U.S. Census Bureau Geocoder | Public data (U.S. government) | With each NCUA import | Oct 19, 2026 |
| Bank branch hours, phones and branch pages (3 of 12 branches: First Interstate Bank, Wells Fargo) | The banks' own branch locators, collected by All The Places | CC0 (All The Places data); each bank's locator is the primary source | Weekly spider run, monthly refresh here | Oct 10, 2026 |
| Savings and CD rates, national averages | Banrox Bank Rates | Banrox, from the banks' own rate pages and FDIC national rates | Weekly | see each rate |
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