Chelsea, Massachusetts

31% of students met the state standard in mathematics and 33% in reading, across the schools here that reported results.

There are 12.2 students for every full-time teacher across 11 public schools, fewer than in most measured places.

Public schools only, from the NCES Common Core of Data, placed by ZIP code — which schools are in this place, not which one a particular address is zoned for. A dash in a proficiency column is a gap in the federal file, not a bad result. Proficiency is measured against Massachusetts’s own standard, so it is ranked within state. How to read school figures.

Population has fallen 1% since 2020, to 40,245 in 2024.

96% of the 80 units permitted over the past twelve months are in buildings of five or more homes, so new supply is concentrated in apartments and condominiums rather than detached houses.

Federal tax returns show Suffolk County, which contains Chelsea, lost about 2.2% of its residents through moves within the US in the most recent year, counting those who arrived against those who left. Households that moved in reported an average income of $93,364, below the $127,357 of households that moved out.

At 2.0 permitted units per 1,000 residents, building activity is below the median for measured US cities.

People moving in and out

Based on the address on federal tax returns, compared with the same filers a year earlier. It counts people who file, and sees a move only when the address on a return changes. Domestic moves only: people arriving from abroad are left out. This is the figure for Suffolk County, MA. IRS Statistics of Income, filing years 2022–2023.

The hazards accounting for most of this area's expected annual loss are inland flooding, hurricane and earthquake, with inland flooding alone responsible for 52% of it. Inland flooding is independently rated low or minimal nationally, so this describes how the loss is composed, not how large that hazard is.

Overall hazard risk is lower than 99% of measured US cities.

Hazard ratings are AreaProfile calculations derived from the FEMA National Risk Index v1.20.0 (December 2025). FEMA publishes at county level. City values are the population-weighted mean of the counties the city overlaps, using AreaProfile place-to-county land-area weights. FEMA does not endorse this presentation. Higher physical resilience means lower exposure.

Below these are deaths rather than offenses, published for the county. The two measure different things and are not comparable with each other.

Chelsea's police department reported 791 violent offenses per 100,000 residents, higher than most places with a department reporting. Property crime runs at 1,415.

Suffolk County records 2.9 homicide deaths per 100,000 residents a year, near the middle of counties measured. The CDC does not publish this below county level.

Drug overdose deaths run at 24.6 per 100,000 residents in Suffolk County.

Firearm deaths count every intent together, and nationally the majority are suicides rather than homicides, so the firearm figure and the homicide figure above it count some of the same deaths twice over. They overlap and should not be added together.

Offenses are reported to the FBI by Chelsea’s own police department and shown only where it reported every month of the year; a partial year is withheld rather than scaled up. Reported crime is what police recorded, which is not the same as what happened. Death rates are crude rates — deaths divided by population, not adjusted for age — except where a count was too small for the CDC to publish and it modeled the rate, which the card marks. They come from provisional death certificate records, published by the CDC by county and not below it. So they describe the county around Chelsea (Suffolk County) rather than Chelsea itself. Neither is part of the Area Score. How to read crime rates and death rates.

6 major airports lie within 100 miles, the nearest General Edward Lawrence Logan Intl at 3 miles.

Airport identity, position and runway data come from the FAA. “Major airport” is an AreaProfile classification — a public-use civil airport with a paved runway of at least 8,000 feet — not an FAA hub designation. Distances are straight-line, not driving distance.