First Bank & Trust holds $4.1B in deposits across 15 counties in 2 ranked markets and 2 states. Its deposit footprint is highly concentrated: the top three counties (Brookings County, Minnehaha County, Pipestone County) hold 67% of its deposits, and South Dakota accounts for 78% of the total. It ranks among the three largest institutions in 7 of the 15 counties where it operates.
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Data as of June 30, 2025 (FDIC Summary of Deposits)
| County | Deposits | County’s % of Bank’s Deposits | Bank’s % of County Deposits | Branches | |
|---|---|---|---|---|---|
| 1. | Brookings County, SD | $1.5B | 35.9% | 67.6% | 5 |
| 2. | Minnehaha County, SD | $990M | 24.4% | 0.3% | 4 |
| 3. | Pipestone County, MN | $286M | 7.1% | 51.7% | 1 |
| 4. | Grant County, SD | $218M | 5.4% | 57.2% | 1 |
| 5. | Lake County, SD | $194M | 4.8% | 44.2% | 1 |
| 6. | Le Sueur County, MN | $155M | 3.8% | 19.9% | 1 |
| 7. | Isanti County, MN | $155M | 3.8% | 27.6% | 1 |
| 8. | Lincoln County, SD | $114M | 2.8% | 0.0% | 1 |
| 9. | Hennepin County, MN | $101M | 2.5% | 0.1% | 1 |
| 10. | Codington County, SD | $91M | 2.2% | 6.0% | 1 |
| 11. | Ramsey County, MN | $77M | 1.9% | 0.1% | 1 |
| 12. | Clay County, SD | $64M | 1.6% | 15.3% | 1 |
| 13. | Deuel County, SD | $57M | 1.4% | 34.6% | 1 |
| 14. | Mille Lacs County, MN | $53M | 1.3% | 7.2% | 1 |
| 15. | Anoka County, MN | $46M | 1.1% | 0.7% | 1 |
Deposits are as reported to the FDIC at branch level, June 30, 2025, and are nominal. “County’s % of Bank’s Deposits” is this county’s share of the institution’s total deposits; “Bank’s % of County Deposits” is this institution’s deposits as a percent of all deposits booked in that county. Counties within a Combined or Metropolitan Statistical Area link to their full profile; other counties are shown for completeness.
All 293 markets and the 1,533 counties within a CSA or MSA are covered in the Market Intelligence resource. See the methodology for how each figure is built and when to expect updates.