Security National Bank of South Dakota
Dakota Dunes, South Dakota, Union County
$251M in total assets, the 2,743rd largest of 4,309 US banks and 33rd of 58 headquartered in South Dakota.
- FDIC certificate
- 34394
- Established
- 1997
- Owned by
- Security National Corp
- Primary regulator
- OCC
- Website
- http://www.snbsd.com
At a glance
Compared with 24 banks headquartered in South Dakota 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 | $251M | 46% | $258M | |
| Loans | $173M | 50% | $179M | |
| Deposits | $195M | 38% | $225M | |
| Return on assets | 2.23% | 88% | 1.59% | |
| Net interest margin | 3.14% | 12% | 3.79% | |
| Efficiency ratio | 42.8% | 12% | 54.3% | |
| Equity to assets | 13.83% | 79% | 10.31% | |
| Loans to deposits | 89% | 61% | 82% |
Growth
Total assets grew 0.3% a year over the last 5 years and 3.2% a year over 10 years, without acquisitions.
Where they operate
3 branches in 3 counties.
Largest markets by deposits
| County | Deposits | Market share | Rank |
|---|---|---|---|
| Union County, SD | $89M | 11.5% | 4 of 9 |
| Lincoln County, SD | $65M | 0.0% | 17 of 26 |
| Minnehaha County, SD | $40M | 0.0% | 22 of 26 |
Deposits by branch from the FDIC Summary of Deposits, June 2026. Rank among all banks with branches in that county.
Branch history since 2016
No change since 2016. The bank has operated 3 branches throughout, with none opened, acquired, closed or sold.
Balance sheet and earnings
Loans by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| 1-4 family residential | 42% | 12% | |
| Commercial real estate | 23% | 13% | |
| Multifamily | 21% | 3% | |
| Business (C&I) | 6% | 10% | |
| Consumer | 4% | 4% | |
| Construction and land | 2% | 3% | |
| Farmland | 2% | 23% | |
| Agricultural | 0% | 31% | |
| Other | 1% | 1% |
Deposits by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Other interest-bearing | 48% | 44% | |
| Time deposits | 31% | 37% | |
| Noninterest-bearing | 20% | 18% |
Brokered deposits are 0.0% of deposits (peers 3.3%).
Return on assets
Trailing four quarters, with the peer median.
Credit and capital
| This bank | Peer median | |
|---|---|---|
| Noncurrent loans | 0.00% | 0.21% |
| Net charge-offs, annualized | 0.00% | 0.00% |
| Reserves to loans | 1.32% | 1.27% |
| Leverage ratio | 14.12% | 10.51% |
Noncurrent loans exclude government-guaranteed portions.
Related banks
Similar size in South Dakota
Largest competitors in Union 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/security-south-dakota