NCUA-insured credit union
Guardian — Oak Creek, WI
Credit Union headquartered in Oak Creek, Wisconsin.
Source: NCUA call report data, data as of March 31, 2026, fetched September 5, 2026
Headquarters and contact
| Address | 7801 S Howell Ave Oak Creek, WI 53154 |
| County | Milwaukee |
| Website | not published in NCUA data |
| Phone | (414) 546-7450 |
NCUA record
| NCUA Charter | 66638 |
| Federal Reserve RSSD ID | 101390 |
| Status | Active |
| Charter type | 2 (STATE) |
| Financials as of | March 31, 2026 |
How to find your Guardian routing number
NCUA does not publish ABA routing numbers, and many credit unions use different routing numbers by state or by account type. The reliable places to find yours: the bottom left of a check from this credit union, the "account details" screen in its online banking, or its official website.
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Offices
| Guardian Credit Union-Oak Creek Office main office Oak Creek, WI |
7801 S Howell Ave, 53154 (414) 546-7450 M-F 9AM to 5PM S 9AM to Noon |
| Guardian Credit Union-Menomonee Falls Office Menomonee Falls, WI |
W186N9559 Bancroft Dr, 53051 (414) 546-7450 M-F 9AM to 5PM S 9AM to Noon |
| Guardian Credit Union-South Milwaukee Office South Milwaukee, WI |
1025 Milwaukee Ave, 53172 (414) 546-7450 M-F 9AM to 5PM S 9AM to Noon |
| Guardian Credit Union-Waukesha Office Waukesha, WI |
1501 E Sunset Dr, 53189 (414) 546-7450 M-F 9AM to 5PM S 9AM to Noon |
| Guardian Credit Union-West Allis Office West Allis, WI |
11220 W Oklahoma Ave, 53227 (414) 546-7450 M-F 9AM to 5 PM S 9AM to Noon |
| Guardian Credit Union-West Milwaukee Office West Milwaukee, WI |
4501 W Greenfield Ave, 53214 (414) 546-7450 M-F 9AM to 5PM S 9AM to Noon |
| Symitar San Diego, CA |
8985 Balboa Ave, 92123 (619) 542-6700 |
Where Guardian has offices
Cities with the most Guardian offices
Largest credit unions headquartered elsewhere in Wisconsin
| Summit Madison | $8.30 billion |
| Landmark Brookfield | $7.73 billion |
| Community First Appleton | $6.66 billion |
| University of Wisconsin Madison | $6.60 billion |
| Royal Eau Claire | $5.90 billion |
| Covantage Antigo | $4.19 billion |
| Connexus Wausau | $4.15 billion |
| Educators Racine | $3.89 billion |
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