Census Tract 821
Open-data reference.
Suffolk County, Massachusetts · Boston GEOID: 25025082100
Tract Snapshot: Census Tract 821, Suffolk County, MA
Census Tract 821 is located in Suffolk County, Massachusetts, inside the municipal boundary of Boston, and contains a population of approximately 4,052 residents per Census ACS 2023 five-year estimates. Median household income here is $29,441 — a figure the Census Bureau classifies as "Low Income Area" when compared with the 2023 national median near $77,000. Median gross rent sits at $814 per month, a useful benchmark for renters comparing local housing costs against nearby neighborhoods. Typical owner-occupied homes are valued around $810,500. The tract's poverty rate is 23.1%, measured as the share of residents with income below the federal poverty threshold.
Census tracts are small, relatively permanent statistical subdivisions of a county designed by the U.S. Census Bureau to contain roughly 1,200 to 8,000 residents, with boundaries held stable across decades so researchers can track neighborhoods over time. Tract-level figures from the American Community Survey are five-year rolling averages rather than snapshots — that smoothing reduces year-to-year noise in small areas but also means the numbers you see here describe the period ending in the reference year rather than a single moment. For context, we link back to the parent city and state pages where you can compare this tract against its neighbors.
Source: U.S. Census Bureau — American Community Survey 5-Year 2023 · GEOID: 25025082100 · Note: ACS margins of error widen at tract level
Location
- Census Tract
- Tract 821
- GEOID (FIPS)
- 25025082100
- County
- Suffolk County
- State
- Massachusetts
- Nearest City
- Boston
- Coordinates
- 42.309449, -71.087229
Income & Housing
Census ACS 5-Year 2023 estimates for this tract
| Metric | Value | Context | Source |
|---|---|---|---|
| Median Household Income | $29,441 | Low Income Area vs. US ~$77,000 | ACS 2023 5-Year |
| Median Gross Rent | $814/mo | Includes utilities in estimate | ACS 2023 5-Year |
| Median Home Value | $810,500 | Owner-occupied units only | ACS 2023 5-Year |
| Poverty Rate | 23.1% | Below federal poverty threshold | ACS 2023 5-Year |
Explore More Data for Boston, MA
What do people ask about Boston, MA?
What is the population of Census Tract 821? +
Census Tract 821 in Suffolk County, Massachusetts has a population of approximately 4,052, based on U.S. Census Bureau ACS 2023 estimates.
What is the median household income in Census Tract 821? +
The median household income in Census Tract 821 (Suffolk County, MA) is $29,441, based on ACS 5-Year 2023 data. This is considered "Low Income Area" relative to the national median of approximately $77,000.
What is the median rent in this area? +
The estimated median gross rent in Census Tract 821 is $814 per month, according to Census ACS 2023 data.
What is the poverty rate in Census Tract 821? +
Approximately 23.1% of residents in Census Tract 821 have income below the federal poverty threshold, based on Census ACS 2023 data.
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- Understanding Cost of Living — Compare income, housing, and poverty data across cities
- How to Read Census Data — Understand margins of error and ACS estimates
Source: U.S. Census Bureau ACS 5-Year Estimates 2023. Census tract boundaries and GEOID from 2023 TIGER/Line files. Population and income data may reflect margins of error for smaller tracts. Last updated: 2026 U.S. Census Bureau ACS 5-Year Estimates 2023. Census tract boundaries and GEOID from 2023 TIGER/Line files. Population and income data may reflect margins of error for smaller tracts. Last updated: 2026
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Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the U.S. Census Bureau ACS. Consult a qualified professional before making decisions based on this data.
Read our methodology — how this data is sourced, computed, and verified.