Buying in Suffolk County, Massachusetts

Suffolk County at a glance

Suffolk County is one of 14 counties and county-equivalents in Massachusetts. Its county seat is Boston. With a 2024 Census Bureau population estimate of 793,144, it is the fourth most populous county in Massachusetts. In the FBI's 2024 reported-crime file, agencies here reported 20,881 offenses — 26.33 per 1,000 residents; the breakdown is below.

Records to check before you buy in Suffolk County

• Property record card — the Suffolk County assessor / appraisal office. Pull the parcel's assessed-value history, exemption status, and last sale. This is the file your future tax bill is calculated from, and it shows whether the current owner is enjoying exemptions you will not inherit. County government sits in Boston — start there for office locations and the parcel search.
• Deeds & liens — the Suffolk County recorder / land-records office. Read the deed chain, open liens, easements, and plat maps — the file a listing never mentions.
• Official flood determination. Check the exact parcel on FEMA's National Flood Hazard Layer — not the listing site's licensed model. Zone boundaries cut through streets; the house next door can be in a different zone. Suffolk County is the primary county for 35 ZIP codes in the Census Bureau's ZIP-to-county crosswalk — and zone lines ignore every one of them.
• The county's reported-crime record. In the FBI's 2024 file, agencies in Suffolk County reported 20,881 offenses — 26.33 per 1,000 residents; the largest single category was larceny-theft (13,419). The crime section below sets that beside the Massachusetts county median.
• Registry check. Run the address through Massachusetts Sex Offender Registry (Sex Offender Registry Board) and note the counts within a mile — then check again the week you close.
• Permits & code history — the Suffolk building department. Open permits, expired permits, and code cases tell you whether the renovation in the photos was ever inspected. County permitting is run out of Boston.
• School assignment — the district office, not the listing. Only the district's own boundary lookup confirms which school an address is actually zoned for.

County list, land area and population: U.S. Census Bureau (population: 2024 PEP estimate). County seat and official website: Wikidata (CC0), checked 2026-11-04. Flood determinations: FEMA. Registry: Massachusetts.

Reported crime in Suffolk County — FBI 2024

Agencies in Suffolk County reported 20,881 offenses to the FBI in 2024 — 4,868 violent and 16,013 property offenses. That works out to a reported-crime rate of 26.33 per 1,000 residents (violent 613.8, property 2018.9 per 100,000).

Inside Massachusetts, the median county in the same file recorded a violent-crime rate of 299 per 100,000 and a property-crime rate of 914 per 100,000 (medians computed from the FBI 2024 county file across 14 counties).

The largest reported categories were larceny-theft (13,419), aggravated assault (3,703) and burglary (1,394).

Coverage: 27 of 27 law-enforcement agencies assigned to this county reported at least one month of 2024 offense data to the FBI; 18 reported all 12 months. Counts are reported offenses only (FBI Return A / Arson master files), assigned whole to each agency's primary county; they are not adjusted for non-reporting agencies.

These are offenses reported to law enforcement — not convictions, and not a verdict on any street or address. A CurbFacts report pairs this county record with the ZIP-level picture for the specific address you are buying.

Source: FBI Crime Data Explorer, UCR Return A + Arson master files, data year 2024 (pulled 2026-11-04).

The Massachusetts rules that apply in Suffolk County

Traps researched for Massachusetts buyers: Title 5 septic inspection can gate the sale; No general disclosure form to rely on.

Read the full Massachusetts guide — disclosure standard, tax math, registry and flood

More Massachusetts counties

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