First Financial Bank holds $14.6B in deposits across 55 counties in 12 ranked markets and 4 states. Its deposit footprint is concentrated: the top three counties (Hamilton County, Butler County, Lake County) hold 42% of its deposits, and Ohio accounts for 52% of the total. It ranks among the three largest institutions in 23 of the 55 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. | Hamilton County, OH | $3.3B | 22.4% | 2.1% | 20 |
| 2. | Butler County, OH | $1.9B | 12.8% | 23.4% | 13 |
| 3. | Lake County, IN | $1.0B | 7.1% | 6.9% | 7 |
| 4. | Bartholomew County, IN | $877M | 6.0% | 48.3% | 6 |
| 5. | Montgomery County, OH | $523M | 3.6% | 4.9% | 7 |
| 6. | Monroe County, IN | $499M | 3.4% | 14.6% | 2 |
| 7. | Mercer County, OH | $464M | 3.2% | 22.3% | 3 |
| 8. | Franklin County, OH | $442M | 3.0% | 0.4% | 4 |
| 9. | Marion County, IN | $392M | 2.7% | 0.9% | 6 |
| 10. | Warren County, OH | $366M | 2.5% | 6.9% | 3 |
| 11. | Jefferson County, KY | $261M | 1.8% | 0.8% | 4 |
| 12. | Franklin County, IN | $251M | 1.7% | 26.0% | 2 |
| 13. | Dearborn County, IN | $248M | 1.7% | 19.1% | 2 |
| 14. | Decatur County, IN | $231M | 1.6% | 30.3% | 3 |
| 15. | Jefferson County, IN | $222M | 1.5% | 36.0% | 3 |
| 16. | Boone County, KY | $220M | 1.5% | 5.9% | 2 |
| 17. | Shelby County, IN | $194M | 1.3% | 8.0% | 1 |
| 18. | Floyd County, IN | $190M | 1.3% | 7.1% | 3 |
| 19. | Hendricks County, IN | $187M | 1.3% | 4.0% | 1 |
| 20. | Hamilton County, IN | $175M | 1.2% | 0.6% | 1 |
| 21. | Rush County, IN | $162M | 1.1% | 43.8% | 1 |
| 22. | Miami County, OH | $161M | 1.1% | 7.4% | 1 |
| 23. | Johnson County, IN | $158M | 1.1% | 4.1% | 1 |
| 24. | Jackson County, IN | $151M | 1.0% | 12.1% | 1 |
| 25. | Jennings County, IN | $142M | 1.0% | 41.2% | 1 |
| 26. | Kenton County, KY | $130M | 0.9% | 3.0% | 2 |
| 27. | Van Wert County, OH | $119M | 0.8% | 15.4% | 1 |
| 28. | Allen County, OH | $99M | 0.7% | 4.1% | 1 |
| 29. | Wayne County, IN | $93M | 0.6% | 3.1% | 2 |
| 30. | Henry County, IN | $90M | 0.6% | 10.5% | 1 |
| 31. | Carroll County, IN | $89M | 0.6% | 22.1% | 2 |
| 32. | Auglaize County, OH | $83M | 0.6% | 7.3% | 1 |
| 33. | Fayette County, IN | $79M | 0.5% | 16.4% | 1 |
| 34. | Paulding County, OH | $75M | 0.5% | 15.8% | 1 |
| 35. | Randolph County, IN | $72M | 0.5% | 10.7% | 1 |
| 36. | Switzerland County, IN | $72M | 0.5% | 57.1% | 1 |
| 37. | Kankakee County, IL | $68M | 0.5% | 2.6% | 1 |
| 38. | Newton County, IN | $66M | 0.5% | 13.5% | 1 |
| 39. | Blackford County, IN | $63M | 0.4% | 34.3% | 2 |
| 40. | Jay County, IN | $61M | 0.4% | 13.3% | 1 |
| 41. | Warren County, IN | $61M | 0.4% | 45.7% | 1 |
| 42. | Anderson County, KY | $56M | 0.4% | 15.2% | 1 |
| 43. | Wabash County, IN | $55M | 0.4% | 9.2% | 1 |
| 44. | Montgomery County, IN | $55M | 0.4% | 6.1% | 1 |
| 45. | Greene County, IN | $52M | 0.4% | 11.5% | 1 |
| 46. | Clinton County, IN | $50M | 0.3% | 7.0% | 1 |
| 47. | Clinton County, OH | $50M | 0.3% | 5.1% | 1 |
| 48. | Shelby County, KY | $49M | 0.3% | 4.5% | 1 |
| 49. | Ohio County, IN | $48M | 0.3% | 38.5% | 1 |
| 50. | Ripley County, IN | $46M | 0.3% | 5.2% | 1 |
| 51. | Mercer County, KY | $46M | 0.3% | 11.7% | 1 |
| 52. | Clark County, IN | $32M | 0.2% | 0.8% | 1 |
| 53. | Vermilion County, IL | $31M | 0.2% | 2.1% | 1 |
| 54. | Iroquois County, IL | $29M | 0.2% | 2.6% | 1 |
| 55. | Clermont County, OH | $1M | 0.0% | 0.0% | 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.