The First National Bank in Sioux Falls
Sioux Falls, South Dakota, Minnehaha County
$2.1B in total assets, the 593rd largest of 4,309 US banks and 11th of 58 headquartered in South Dakota.
- FDIC certificate
- 4016
- Established
- 1885
- Owned by
- Minnehaha Banshares Inc
- Primary regulator
- OCC
- Website
- www.fnbsf.com
At a glance
Compared with 16 banks headquartered in South Dakota with $1 billion to $10 billion in assets, as of June 30, 2026.
| Measure | This bank | Percentile | Peer range, middle 90% | Peer median |
|---|---|---|---|---|
| Total assets | $2.1B | 50% | $2.1B | |
| Loans | $1.6B | 50% | $1.6B | |
| Deposits | $1.8B | 50% | $1.8B | |
| Return on assets | 1.17% | 31% | 1.44% | |
| Net interest margin | 3.56% | 12% | 4.02% | |
| Efficiency ratio | 63.0% | 62% | 58.5% | |
| Equity to assets | 9.31% | 25% | 10.60% | |
| Loans to deposits | 90% | 53% | 87% |
Growth
Total assets grew 6.1% a year over the last 5 years and 6.3% a year over 10 years, without acquisitions.
Acquisitions
| Closed | Acquired bank | Assets at acquisition |
|---|---|---|
| Apr 2007 | Farmers State Bank Flandreau, SD, an affiliate under the same holding company | $82M |
| Nov 1979 | Dakota State Bank of Dell Rapids, South Dakota Dell Rapids, SD | n/a |
Where they operate
18 branches in 3 counties.
Largest markets by deposits
| County | Deposits | Market share | Rank |
|---|---|---|---|
| Minnehaha County, SD | $1.4B | 0.3% | 4 of 26 |
| Lincoln County, SD | $246M | 0.0% | 4 of 26 |
| Moody County, SD | $94M | 62.1% | 1 of 3 |
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 1 branch since 2016 (17 to 18, +5.9%). 3 opened, 0 acquired, 2 closed or sold.
| Period | What happened | Opened or acquired | Closed or sold | Net change | Branches at end |
|---|---|---|---|---|---|
| Start of 2016 | Starting point | 17 | |||
| 2017 | Opened Sioux FallsClosed Sioux Falls | 1 | 1 | 0 | 17 |
| 2018 | Opened Sioux FallsClosed Sioux Falls | 2 | 1 | +1 | 18 |
Balance sheet and earnings
Loans by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Agricultural | 23% | 7% | |
| 1-4 family residential | 21% | 11% | |
| Business (C&I) | 19% | 18% | |
| Commercial real estate | 17% | 24% | |
| Farmland | 13% | 7% | |
| Multifamily | 4% | 8% | |
| Construction and land | 3% | 7% | |
| Consumer | 2% | 13% | |
| Other | 0% | 4% |
Deposits by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Other interest-bearing | 59% | 42% | |
| Noninterest-bearing | 23% | 32% | |
| Time deposits | 18% | 26% |
Brokered deposits are 4.4% of deposits (peers 8.2%).
Return on assets
Trailing four quarters, with the peer median.
Credit and capital
| This bank | Peer median | |
|---|---|---|
| Noncurrent loans | 0.41% | 0.87% |
| Net charge-offs, annualized | 0.08% | 0.23% |
| Reserves to loans | 1.46% | 1.19% |
| Leverage ratio | 10.34% | 10.39% |
Noncurrent loans exclude government-guaranteed portions.
Related banks
Similar size in South Dakota
Largest competitors in Minnehaha County, SD
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-national-bank-in-sioux-falls-sd