Suffolk County, Massachusetts
Suffolk County is a county in Massachusetts. Its county FIPS code is 25025. Use the boundary map and neighboring areas below to check the jurisdiction you need.
- Official code
- 25025
- Representative coordinates
- 42.338551, -71.018253
- County type
- County
- County seat or government
- Boston
- Resident population, July 2025
- 791,891
- Land area
- 150.886 km²
- Water area
- 160.491 km²
- State
- Massachusetts
The representative point identifies this area. It is not a street address or a boundary survey.
Time zones in Suffolk County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| America/New_York | UTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Listed zones overlap the mapped area. A point lookup can distinguish sides of a boundary. Your device’s zone may differ.
Census ZIP areas
02108 · 02109 · 02110 · 02111 · 02113 · 02114 · 02115 · 02116 · 02118 · 02119 · 02120 · 02121 · 02122 · 02124 · 02125 · 02126 · 02127 · 02128 · 02129 · 02130 · 02131 · 02132 · 02133 · 02134 · 02135 · 02136 · 02149 · 02150 · 02151 · 02152 · 02163 · 02199 · 02203 · 02205 · 02210 · 02215 · 02445 · 02446 · 02467
These statistical areas overlap the boundary. They are not delivery assignments; confirm mailing details with USPS ZIP Code Lookup.
Official county information
Use the US government local-office directory ↗ to find the office responsible for your address. A county website has not been confidently matched here. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Cities, towns and communities
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
Areas sharing the mapped boundary
These areas touch this mapped boundary.
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county at your current point, check its ZIP area, or find its physical time zone.