Town in Pennington County, South Dakota · 3 sq mi · 91 people per sq mi
About 270 people live in Keystone. The typical household earns $64,702, and the median resident is 38.1 years old.
2026 projection
From 249 in 2020
Poverty rate 6.85%
Men 38.2 · Women 37.6
2010–2026
272
2026 projection
9.2% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
2010–2026
272
2026 projection
9.2% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 272 | +4 | 1.49% |
|---|---|---|---|
| 2025 | 268 | +2 | 0.75% |
| 2024 | 266 | +19 | 7.69% |
| 2023 | 247 | -2 | 0.80% |
| 2022 | 249 | -1 | 0.40% |
| 2021 | 250 | +1 | 0.40% |
| 2020 | 249 | -96 | 27.83% |
| 2019 | 345 | +4 | 1.17% |
| 2018 | 341 | +2 | 0.59% |
| 2017 | 339 | -1 | 0.29% |
Showing 10 of 17 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 3 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 15 residents
56% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 56% | 55% | 57% |
| Never married | 26% | 22% | 31% |
| Divorced | 16% | 21% | 11% |
| Widowed | 2% | 2% | 2% |
| Separated | 0% | 0% | 0% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau