Buying in Sullivan County, New York

Sullivan County at a glance

Sullivan County is one of 62 counties and county-equivalents in New York. Its county seat is Monticello. County government publishes its offices and parcel tools online. Official county website. Its 2024 Census Bureau population estimate is 80,450 across 968 square miles of land — about 83 people per square mile. In the FBI's 2024 reported-crime file, agencies here reported 649 offenses — 8.07 per 1,000 residents; the breakdown is below.

Records to check before you buy in Sullivan County

• Property record card — the Sullivan 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 Monticello; the official county website is the reliable route to the parcel search and the office directory.
• Deeds & liens — the Sullivan 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. Sullivan County is the primary county for 52 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 Sullivan County reported 649 offenses — 8.07 per 1,000 residents; the largest single category was larceny-theft (431). The crime section below sets that beside the New York county median.
• Registry check. Run the address through New York State Sex Offender Registry (New York State Division of Criminal Justice Services (DCJS)) and note the counts within a mile — then check again the week you close.
• Permits & code history — the Sullivan 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 Monticello.
• 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: New York.

Reported crime in Sullivan County — FBI 2024

Reported crime in Sullivan County in 2024 was overwhelmingly property crime: agencies logged 649 offenses, of which 565 were property offenses and 84 violent. The total rate is 8.07 per 1,000 residents (violent 104.4, property 702.3 per 100,000).

Inside New York, the median county in the same file recorded a violent-crime rate of 99 per 100,000 and a property-crime rate of 827 per 100,000 (medians computed from the FBI 2024 county file across 60 counties).

The largest reported categories were larceny-theft (431), burglary (115) and aggravated assault (69).

Coverage: 9 of 9 law-enforcement agencies assigned to this county reported at least one month of 2024 offense data to the FBI; 6 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).

ZIP guides in Sullivan County

Registry counts and county crime records for the 34 ZIP codes whose primary county is Sullivan County.

The New York rules that apply in Sullivan County

Traps researched for New York buyers: The $500 credit opt-out no longer exists; Online registry shows only Level 2 and Level 3 offenders.

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

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