Branch Network
First Southern Bank Locations & Branches Marion, Illinois
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First Southern Bank operates 19 branches from its headquarters in Marion, IL, .
First Southern Bank branch network
All 19 branches are in ILLINOIS, across 11 cities. Marion, IL has the most of its branches, 6. Its largest office by deposits is the Carbondale Main Street Branch office in Carbondale, IL, with $335.0M (37.0% of its branch deposits). It had the same number of branches on June 30, 2025.
First Southern Bank at a glance
It reports no CET1 ratio; its Tier 1 leverage ratio was 10.85% at Q2 2026, above the 9% community bank leverage ratio requirement for being considered well capitalized.
- Total assets, Q2 2026
- $1.04B
- Tier 1 leverage ratio, Q2 2026
- 10.85%
- Deposit insurance
- FDIC
- Regulator
- FDIC
- Established
- 1937
Full financial profile · Is First Southern Bank safe? · 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: Marion, IL (6 branches) | 2 of 13 | 17.5% | $218.9M |
| State: IL (19 branches) | 69 of 379 | 0.1% | $904.3M |
Ranked by total assets among banks headquartered in the state: Largest banks in Illinois.
Share by county and metro area
First Southern 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 |
|---|---|---|---|---|
| Jackson, IL (7 branches) | 1 of 11 | 39.4% | $471.2M | $1.19B |
| Williamson, IL (9 branches) | 2 of 14 | 17.3% | $330.1M | $1.90B |
| Saline, IL (2 branches) | 6 of 7 | 9.7% | $89.6M | $920.2M |
| Franklin, IL (1 branch) | 8 of 9 | 1.6% | $13.3M | $826.1M |
Metro areas
| Metro area | Rank | Deposit share | Deposits | Metro total |
|---|---|---|---|---|
| Carbondale-Marion, IL (16 branches) | 1 of 18 | 23.6% | $801.3M | $3.40B |
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Carbondale Main Street Branch | Carbondale, IL | 62901 | $335.0M |
| First Southern Bank (main office) | Marion, IL | 62959 | $105.2M |
| Herrin Security Bank Branch | Herrin, IL | 62948 | $91.3M |
| Carbondale West Branch | Carbondale, IL | 62901 | $68.3M |
| Carbon Branch | Marion, IL | 62959 | $55.4M |
| C.P. Burnett & Sons, Bankers Bank Branch | Eldorado, IL | 62930 | $54.5M |
| Illinois Centre Mall Branch | Marion, IL | 62959 | $37.0M |
| Carrier Mills Facility | Carrier Mills, IL | 62917 | $35.1M |
| Murphysboro Branch | Murphysboro, IL | 62966 | $31.7M |
| Airport Business Center Branch | Marion, IL | 62959 | $19.1M |
| Murphysboro Branch | Murphysboro, IL | 62966 | $19.0M |
| Royalton Facility | Royalton, IL | 62983 | $13.3M |
| Grand Tower Branch | Grand Tower, IL | 62942 | $10.6M |
| Creal Springs Facility | Creal Springs, IL | 62922 | $10.2M |
| Carterville Branch | Carterville, IL | 62918 | $9.7M |
| Carbondale Drive Thru Branch | Carbondale, IL | 62901 | $6.1M |
| Court Branch | Marion, IL | 62959 | $1.9M |
| Vergennes Branch | Vergennes, IL | 62994 | $543K |
| Marion Mobile Branch | Marion, IL | 62959 | $362K |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 15565) · FFIEC NIC profile (RSSD 382649)