Branch Network
The First Security Bank Locations & Branches Overbrook, Kansas
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The First Security Bank operates 8 branches from its headquarters in Overbrook, KS, .
The First Security Bank branch network
All 8 branches are in KANSAS, across 8 cities. Its largest office by deposits is the Conway Bank Branch office in Conway Springs, KS, with $35.2M (18.4% of its branch deposits). On June 30, 2025 it had 4 branches, 4 fewer than in 2026.
The First Security Bank at a glance
Its CET1 capital ratio was 11.14% at Q2 2026, above regulatory requirements.
- Total assets, Q2 2026
- $225.6M
- CET1 ratio, Q2 2026
- 11.14%
- Deposit insurance
- FDIC
- Regulator
- FDIC
- Latest call report
- Q2 2026, FFIEC 041
- Established
- 1897
Full financial profile · Is The First Security Bank safe? · The First Security Bank call report · Routing number
Deposit market share
Share of all FDIC-insured deposits held in each area, from the June 30, 2026 Summary of Deposits. Rank 1 is the largest holder. Shares are by bank charter, not by holding company.
| Area | Rank | Deposit share | Deposits |
|---|---|---|---|
| City: Overbrook, KS (1 branch) | 2 of 2 | 30.0% | $30.7M |
| State: KS (8 branches) | 104 of 231 | 0.2% | $191.4M |
Ranked by total assets among banks headquartered in the state: Largest banks in Kansas.
Share by county and metro area
The First Security Bank's share of FDIC-insured deposits in the counties and metro areas where it has branches, from the June 30, 2026 Summary of Deposits. Up to the ten largest of each are shown, by the bank's deposits. Rank 1 is the largest holder. Banks only: credit unions are not in the Summary of Deposits.
Counties
| County | Rank | Deposit share | Deposits | County total |
|---|---|---|---|---|
| Sumner, KS (2 branches) | 5 of 10 | 8.7% | $59.2M | $683.4M |
| Osage, KS (2 branches) | 4 of 7 | 15.1% | $58.7M | $389.3M |
| Sedgwick, KS (1 branch) | 36 of 38 | 0.1% | $25.9M | $19.80B |
| Kingman, KS (1 branch) | 4 of 4 | 6.7% | $17.7M | $265.1M |
| Miami, KS (1 branch) | 6 of 8 | 1.7% | $16.0M | $922.5M |
| Leavenworth, KS (1 branch) | 10 of 10 | 0.8% | $13.9M | $1.66B |
Metro areas
| Metro area | Rank | Deposit share | Deposits | Metro total |
|---|---|---|---|---|
| Wichita, KS (3 branches) | 37 of 46 | 0.4% | $85.2M | $23.20B |
| Topeka, KS (2 branches) | 20 of 30 | 0.8% | $58.7M | $7.06B |
| Kansas City, MO-KS (2 branches) | 100 of 114 | <0.1% | $29.9M | $98.85B |
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Conway Bank Branch | Conway Springs, KS | 67031 | $35.2M |
| The First Security Bank | Overbrook, KS | 66524 | $30.7M |
| Carbondale Branch | Carbondale, KS | 66414 | $27.9M |
| Downtown Wichita Branch | Wichita, KS | 67202 | $25.9M |
| Farmers & Merchants Branch | Argonia, KS | 67004 | $24.0M |
| Norwich Branch | Norwich, KS | 67118 | $17.7M |
| Paola Branch | Paola, KS | 66071 | $16.0M |
| The First Security Bank Tonganoxie Branch | Tonganoxie, KS | 66086 | $13.9M |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 4752) · FFIEC NIC profile (RSSD 460350)