Security First Bank holds $2.3B in total assets and has $2.0B in deposits across 20 counties in 2 ranked markets and 2 states. Its deposit footprint is concentrated: the top three counties (Pennington County, South Dakota, Gage County, Nebraska, and Lancaster County, Nebraska) hold 47% of its deposits, and Nebraska accounts for 77% of the total. It is among the top three banks by deposits in 10 of the 20 counties where it operates. Figures are from the FDIC Summary of Deposits as of June 30, 2026, and are refreshed once a year after the next survey is released, not quarterly.
Deposits by county
Data as of June 30, 2026 (FDIC Summary of Deposits)
| County | Deposits | County’s % of Bank’s Deposits | Bank’s % of County Deposits | Branches |
|---|---|---|---|---|
| Pennington County, SD | $374M | 18.4% | 11.4% | 2 |
| Gage County, NE | $305M | 15.0% | 34.1% | 6 |
| Lancaster County, NE | $284M | 14.0% | 1.9% | 3 |
| Sheridan County, NE | $234M | 11.5% | 41.6% | 2 |
| Cherry County, NE | $158M | 7.8% | 41.0% | 3 |
| Cheyenne County, NE | $133M | 6.6% | 27.6% | 1 |
| Bennett County, SD | $94M | 4.7% | 100.0% | 1 |
| Dawes County, NE | $78M | 3.9% | 23.7% | 2 |
| Holt County, NE | $65M | 3.2% | 10.5% | 2 |
| Dawson County, NE | $53M | 2.6% | 3.5% | 2 |
| Custer County, NE | $53M | 2.6% | 9.6% | 2 |
| Sioux County, NE | $32M | 1.6% | 57.6% | 1 |
| Garfield County, NE | $32M | 1.6% | 32.3% | 1 |
| Thomas County, NE | $30M | 1.5% | 42.5% | 1 |
| Valley County, NE | $28M | 1.4% | 11.8% | 1 |
| Gosper County, NE | $22M | 1.1% | 32.9% | 1 |
| Scotts Bluff County, NE | $17M | 0.8% | 1.4% | 1 |
| Madison County, NE | $16M | 0.8% | 0.6% | 1 |
| Box Butte County, NE | $12M | 0.6% | 3.4% | 1 |
| Red Willow County, NE | $10M | 0.5% | 1.6% | 1 |
“Deposits (SOD)” are deposits as reported to the FDIC at branch level in the Summary of Deposits (SOD), June 30, 2026, and are nominal. They reflect where deposits are booked and may differ from the institution’s balance-sheet total. “County’s % of Bank’s Deposits” is this county’s share of the institution’s total SOD 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.
Browse all covered institutions in the bank directory or the banks headquartered in NE. All 293 markets and the 1,523 counties with a branch 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, or the disclaimer for how this data should, and should not, be read.
Security First Bank is named on this page solely to describe publicly reported FDIC deposit data. Its appearance does not imply any affiliation between Security First Bank and The Executive Recruiter Group, or endorsement by either.