City in Lake County, South Dakota · 4.6 sq mi · 1,311 people per sq mi
6,050 people live in Madison. The typical household earns $65,593, and the median resident is 40.1 years old.
2026 projection
From 6,191 in 2020
Poverty rate 9.46%
Men 36.5 · Women 43.4
1880–2026
6,050
2026 projection
2.3% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1880–2026
6,050
2026 projection
2.3% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 6,050 | -15 | 0.25% |
|---|---|---|---|
| 2025 | 6,065 | -36 | 0.59% |
| 2024 | 6,101 | -6 | 0.10% |
| 2023 | 6,107 | +30 | 0.49% |
| 2022 | 6,077 | +14 | 0.23% |
| 2021 | 6,063 | -128 | 2.07% |
| 2020 | 6,191 | -211 | 3.30% |
| 2019 | 6,402 | -269 | 4.03% |
| 2018 | 6,671 | +16 | 0.24% |
| 2017 | 6,655 | -5 | 0.08% |
Showing 10 of 30 years.
The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.
Madison has a population change lower than Lake County, South Dakota, and the U.S.
Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.
Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 61 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 11 residents
42% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 42% | 42% | 42% |
| Never married | 38% | 45% | 31% |
| Divorced | 10% | 9% | 11% |
| Widowed | 7% | 1% | 14% |
| Separated | 2% | 2% | 2% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources