Bennett County, South Dakota
Bennett County, South Dakota, has 3,307 residents (July 2025 estimate). Its county seat is Martin. It uses Mountain Time and covers 1,185 sq mi (3,068 km²) of land.
- Resident population, July 2025
- 3,307
- Land area
- 1,185 sq mi (3,068 km²)
- County seat or government
- Martin
- Time zone
- Mountain TimeUTC-07:00 in January; UTC-06:00 in July
- Median household income
- $53,750 ± $17,540
- Median home value
- $156,400 ± $22,228
- Median rent, with utilities
- $617 ± $65
- Homes lived in by their owners
- 61.2% ± 10.1 points
- County type
- County
- Metro or micro area
- Outside any metro or micro area
- Water area
- 5.81 sq mi (15 km²)
- State
- South Dakota
- County code (FIPS)
- 46007
- Coordinates (central point)
- 43.186912, -101.677181
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Bennett County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Mountain TimeAmerica/Denver | UTC-07:00 in January; UTC-06:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 575512,084 people
- 577521,553 people
- 577141,144 people
- 57577940 people
- 57560391 people
- 57716201 people
- 5757473 people
7 ZIP Code areas overlap Bennett County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
School districts in Bennett County, largest first
- Bennett County School District 03-13,345 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Tribal areas in Bennett County, largest first
- Pine Ridge Reservation18,758 people
American Indian, Alaska Native and Native Hawaiian areas as the Census Bureau maps them, with at least 2% of their area here, water included. These lines don’t decide membership, jurisdiction or land status.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Martin, South Dakota (city)947 people
- Allen, South Dakota (CDP)783 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Jackson County, South Dakota34 mi north
- Oglala Lakota County, South Dakota46 mi west
- Todd County, South Dakota49 mi east
- Cherry County, Nebraska53 mi southeast
- Mellette County, South Dakota54 mi northeast
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county where you are now, check its ZIP area, or check the time zone where you are.
Areas that only touch the edge
These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.