City in Suffolk County, Massachusetts · 2.2 sq mi · 18,045 people per sq mi
40,037 people live in Chelsea. The typical household earns $72,179, and the median resident is 34.4 years old.
2026 projection
From 40,787 in 2020
Poverty rate 20.75%
Men 35.1 · Women 32.9
1790–2026
40,037
2026 projection
1.8% 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.
1790–2026
40,037
2026 projection
1.8% 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 | 40,037 | -93 | 0.23% |
|---|---|---|---|
| 2025 | 40,130 | -44 | 0.11% |
| 2024 | 40,174 | +606 | 1.53% |
| 2023 | 39,568 | +32 | 0.08% |
| 2022 | 39,536 | -58 | 0.15% |
| 2021 | 39,594 | -1,193 | 2.92% |
| 2020 | 40,787 | -197 | 0.48% |
| 2019 | 40,984 | -118 | 0.29% |
| 2018 | 41,102 | -222 | 0.54% |
| 2017 | 41,324 | +149 | 0.36% |
Showing 10 of 39 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.
Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 399 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 5 residents
35% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 35% | 36% | 34% |
| Never married | 47% | 52% | 41% |
| Divorced | 9% | 7% | 11% |
| Widowed | 5% | 3% | 7% |
| Separated | 5% | 2% | 7% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources