One American Bank
Centerville, SD · Owner: One American Financial Corp
$285M
total assets, June 30, 2026
$285M
total assets, June 30, 2026
One American Bank is a state nonmember bank based in Centerville, SD, owned by One American Financial Corp. As of June 30, 2026 it held $285.2 million in assets and $231.5 million in deposits; assets were down 25.9% from a year before. It has 3 branches.
Updated Oct 11, 2026 · numbers as of June 30, 2026
Total assets
$285M
-25.9% in a year · -20.9% in a quarter
Deposits
$232M
-10.8% in a year · -3.8% in a quarter
Loans
$226M
-22.0% in a year · -16.0% in a quarter
Profit so far
-$6.6M
Jan 1 to Jun 30, 2026
Capital ratio
8.35%
+0.13 pts in a year
Return on assets
-3.96%
-2.31 pts in a year
Facts
- Type
- State nonmember bank
- Head office
- 549 Broadway St, Centerville, SD, 57014
- County
- Turner
- Holding company
- One American Financial Corp
- Established
- Jan 1, 1883
- Employees
- 38
- Branches
- 3
- Website
- www.oneamericanbank.com
- Id
- b6078
Quarter by quarter
March 31, 1984 to June 30, 2026
Assets, deposits and loans
Each quarter end, US dollars
Profit by quarter
Net income of each quarter, the last 12
Ratios
Percent. Return on assets and net interest margin are yearly rates.
Branches
3 offices as of June 30, 2026, holding $231.5 million in deposits
Branch map
Every branch, sized by its deposits
| State | Branches | Deposits | Share |
|---|---|---|---|
| South Dakota | 3 | $232M | 100.0% |
| Largest branches | Place | Deposits |
|---|---|---|
| Sioux Falls Branch | Sioux Falls, SD | $158M |
| 49Th St | Sioux Falls, SD | $37.8M |
| One American Bank (main office) | Centerville, SD | $35.3M |
Related pages
Questions and answers
How big is One American Bank?
$285.2 million in total assets and $231.5 million in deposits as of June 30, 2026, with assets down 25.9% from a year before. Its loans were $225.8 million.
How many branches does One American Bank have?
3 branches in South Dakota as of June 30, 2026.
Is One American Bank profitable?
No: it lost $6.62 million from January 1 to June 30, 2026. Its return on assets was -3.96% a year; about 1% is typical.
Who owns One American Bank?
One American Bank is owned by One American Financial Corp, its holding company.
Official public data from the reports every insured bank files each quarter. Profit so far runs from January 1 to the quarter end. Branch deposits are counted once a year, as of June 30. New quarters appear about two months after the quarter ends.