The First Security Bank
Overbrook, Kansas, Osage County
$226M in total assets, the 2,874th largest of 4,309 US banks and 85th of 185 headquartered in Kansas.
- FDIC certificate
- 4752
- Established
- 1897
- Owned by
- Overbrook Bankshares Inc
- Primary regulator
- FDIC
- Website
- www.firstsecurityks.com
At a glance
Compared with 116 banks headquartered in Kansas with $100 million to $1 billion in assets, as of June 30, 2026.
| Measure | This bank | Percentile | Peer range, middle 90% | Peer median |
|---|---|---|---|---|
| Total assets | $226M | 45% | $263M | |
| Loans | $156M | 48% | $173M | |
| Deposits | $191M | 46% | $217M | |
| Return on assets | 2.03% | 91% | 1.39% | |
| Net interest margin | 4.29% | 67% | 3.97% | |
| Efficiency ratio | 50.8% | 28% | 58.7% | |
| Equity to assets | 9.03% | 34% | 10.25% | |
| Loans to deposits | 82% | 60% | 78% |
Growth
Total assets grew 24.5% a year over the last 5 years and 14.8% a year over 10 years, including 1 acquisition in the last 10 years.
Acquisitions
| Closed | Acquired bank | Assets at acquisition |
|---|---|---|
| May 2026 | Conway Bank Conway Springs, KS | $136M |
| Jul 2012 | State Bank of Carbondale Carbondale, KS | $18M |
Where they operate
8 branches in 6 counties.
Largest markets by deposits
| County | Deposits | Market share | Rank |
|---|---|---|---|
| Sumner County, KS | $59M | 8.6% | 6 of 10 |
| Osage County, KS | $59M | 15.1% | 4 of 7 |
| Sedgwick County, KS | $26M | 0.1% | 36 of 38 |
| Kingman County, KS | $18M | 6.7% | 4 of 4 |
| Miami County, KS | $16M | 1.7% | 6 of 8 |
| Leavenworth County, KS | $14M | 0.8% | 10 of 10 |
Deposits by branch from the FDIC Summary of Deposits, June 2026. Rank among all banks with branches in that county.
Branch history since 2016
Net gain of 5 branches since 2016 (3 to 8, +166.7%). 1 opened, 4 acquired, 0 closed or sold.
| Period | What happened | Opened or acquired | Closed or sold | Net change | Branches at end |
|---|---|---|---|---|---|
| Start of 2016 | Starting point | 3 | |||
| 2023 | Opened Tonganoxie | 1 | 0 | +1 | 4 |
| 2026 through Q2 | Acquired Conway Bank | 4 | 0 | +4 | 8 |
Balance sheet and earnings
Loans by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| 1-4 family residential | 34% | 27% | |
| Commercial real estate | 24% | 17% | |
| Farmland | 14% | 17% | |
| Agricultural | 11% | 14% | |
| Business (C&I) | 8% | 11% | |
| Construction and land | 6% | 5% | |
| Consumer | 2% | 4% | |
| Multifamily | 0% | 2% | |
| Other | 1% | 2% |
Deposits by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Other interest-bearing | 43% | 46% | |
| Time deposits | 37% | 34% | |
| Noninterest-bearing | 20% | 20% |
Brokered deposits are 2.0% of deposits (peers 3.7%).
Return on assets
Trailing four quarters, with the peer median.
Credit and capital
| This bank | Peer median | |
|---|---|---|
| Noncurrent loans | 1.89% | 0.23% |
| Net charge-offs, annualized | 0.52% | 0.00% |
| Reserves to loans | 1.09% | 1.27% |
| Leverage ratio | 7.98% | 10.57% |
Noncurrent loans exclude government-guaranteed portions.
Related banks
Similar size in Kansas
Largest competitors in Sumner County, KS
Figures as of June 30, 2026 from the bank's Call Report, FDIC structure and branch data, and the Federal Reserve. Short link: bankingstats.com/banks/first-security-bank-overbrook-ks