Banks in Marengo, IA

Bank branch map: Marengo

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: 2 banks and credit unions operate 2 locations in Marengo, according to the FDIC. 2 of them have coordinates on record and are on the map. ATMs and opening hours are not in the sources this page uses yet; each marker links to directions.

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 in Marengo

Sorted by number of local branches. Each branch shows where its hours and phone number come from.

Short answer: Grinnell State Bank and Keystone Savings Bank have the most locations in Marengo, with 1 each. 2 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.

Grinnell State Bank 1 branch · main office Grinnell, IA Bank · 1

Grinnell State Bank has 1 branch in Marengo, 4 across Iowa and 4 nationwide. FDIC records list its main office in Grinnell, IA and show it operating since 1925. With $498.6 million in total assets on June 30, 2026, it ranks No. 1,800 of 4,232 U.S. banks by total assets. The Marengo Branch at 1101 Court Ave dates to 1929 in FDIC branch records. It does not publish hours in the sources this page uses; check its site before you go.

• Marengo Branch

  1101 Court Ave, 52301

  Hours: see the bank's site
  DirectionsWebsite

Grinnell State Bank: profile, branches and contacts

Keystone Savings Bank 1 branch · main office Marengo, IA Bank · 1

Keystone Savings Bank has 1 branch in Marengo, 5 across Iowa and 5 nationwide. FDIC records list its main office in Marengo, IA and show it operating since 1935. With $200.8 million in total assets on June 30, 2026, it ranks No. 2,988 of 4,232 U.S. banks by total assets. Its main office at 330 Western Avenue dates to 1935 in FDIC branch records. It does not publish hours in the sources this page uses; check its site before you go.

• Main Office main office

  330 Western Avenue, 52301

  Hours: see the bank's site
  DirectionsWebsite

Keystone Savings Bank: profile, branches and contacts

Banking in Marengo: the local picture

Short answer: 2 banks run 2 branches in Marengo 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 2 banks, 1 has its main office in Marengo, 1 elsewhere in Iowa, according to the FDIC.

The bank with the longest record here is Grinnell State Bank, operating since 1925 according to the FDIC. In FDIC branch records, the longest-running branch is Grinnell State Bank's office at 1101 Court Ave, dating to 1929; the newest is Keystone Savings Bank's at 330 Western Avenue, from 1935.

None of the 2 locations here publishes hours in the sources this page uses. Each branch links to the bank's own site.

Chase, Bank of America and other national banks

Which big national banks have branches in Marengo, and where the nearest one is if they do not.

Short answer: No branches in Marengo: Chase (nearest in Cedar Rapids, 21 mi), Wells Fargo (nearest in Cedar Rapids, 22 mi), Bank of America (nearest in Des Moines, 81 mi), PNC Bank, U.S. Bank (nearest in Cedar Rapids, 21 mi), Truist, Fifth Third Bank, Huntington, Regions Bank (nearest in Waterloo, 49 mi), TD Bank, BMO (nearest in Cedar Rapids, 25 mi).

Branch counts from FDIC BankFind as of September 5, 2026. Distances are straight-line miles from the center of Marengo to the nearest branch in Iowa.

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%.

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 Marengo residents like anyone else.

Banks near Marengo

Nearby cities with at least two banks, by straight-line distance. Counts from FDIC BankFind.

Short answer: The closest towns with more choice are Williamsburg (10 miles) and Victor (12 miles). Cedar Rapids, 24 miles away, has the most banks nearby: 18.

Bank branch openings and closings in Marengo

FDIC branch records, between September 5, 2025 and September 5, 2026.

Short answer: FDIC branch records show no bank branch openings in Marengo between September 5, 2025 and September 5, 2026. Closings and relocations are not tracked by the sources this page uses yet.

Banks and credit unions based in Marengo

Short answer: 1 institution has its main office in Marengo: Keystone Savings Bank.

Banks: FDIC BankFind (community-bank flag and assets). Credit unions: NCUA call report.

Largest banks in Marengo by total assets

Ranked by each bank's total assets on its FDIC balance sheet, which covers the whole bank, not only its Marengo offices.

Short answer: Grinnell State Bank is the largest bank with offices in Marengo, with $498.6 million in total assets on June 30, 2026, No. 1,800 among U.S. banks by total assets. Keystone Savings Bank is second with $200.8 million. 1 of the 2 bank is headquartered here. Local deposit shares will follow once the FDIC Summary of Deposits is imported.

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 Marengo: FAQ

How we build this page

Every figure above comes from one of these sources. Nothing is typed by hand, nothing is estimated.