You are eligible for membership into 1st MidAmerica Credit Union if:
- You are related by blood, marriage or adoption to a current member;
- Illinois residents: If you live, work or maintain an address in one of the following counties:
| Bond | Clinton | Jefferson | Madison | Morgan | St. Clair |
| Brown | DeWitt | Jersey | Marion | Moultrie | Sangamon |
| Calhoun | Effingham | Logan | Menard | Piatt | Scott |
| Cass | Fayette | Macon | Monroe | Pike | Shelby |
| Christian | Greene | Macoupin | Montgomery | Randolph | Washington |
- Missouri residents: If you live, work or maintain an address in Jackson County;
- We serve the financial needs of employees of several select employee groups we serve.
