Suffolk County, New York
Suffolk County is a county in New York. Its county FIPS code is 36103. Use the boundary map and neighboring areas below to check the jurisdiction you need.
- Official code
- 36103
- Representative coordinates
- 40.943554, -72.692218
- County type
- County
- County seat or government
- Riverhead
- Resident population, July 2025
- 1,546,090
- Land area
- 2,359.323 km²
- Water area
- 3,787.372 km²
- State
- New York
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
06390 · 11701 · 11702 · 11703 · 11704 · 11705 · 11706 · 11713 · 11715 · 11716 · 11717 · 11718 · 11719 · 11720 · 11721 · 11722 · 11724 · 11725 · 11726 · 11727 · 11729 · 11730 · 11731 · 11733 · 11735 · 11738 · 11739 · 11740 · 11741 · 11742 · 11743 · 11746 · 11747 · 11749 · 11751 · 11752 · 11754 · 11755 · 11757 · 11758 · 11763 · 11764 · 11766 · 11767 · 11768 · 11769 · 11770 · 11772 · 11776 · 11777 · 11778 · 11779 · 11780 · 11782 · 11784 · 11786 · 11787 · 11788 · 11789 · 11790 · 11792 · 11794 · 11795 · 11796 · 11798 · 11901 · 11930 · 11931 · 11932 · 11933 · 11934 · 11935 · 11937 · 11939 · 11940 · 11941 · 11942 · 11944 · 11946 · 11947 · 11948 · 11949 · 11950 · 11951 · 11952 · 11953 · 11954 · 11955 · 11956 · 11957 · 11958 · 11959 · 11960 · 11961 · 11962 · 11963 · 11964 · 11965 · 11967 · 11968 · 11970 · 11971 · 11972 · 11973 · 11975 · 11976 · 11977 · 11978 · 11980
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.
- Amagansett CDP, NY
- Amityville village, NY
- Aquebogue CDP, NY
- Asharoken village, NY
- Babylon village, NY
- Baiting Hollow CDP, NY
- Bayport CDP, NY
- Bay Shore CDP, NY
- Baywood CDP, NY
- Belle Terre village, NY
- Bellport village, NY
- Blue Point CDP, NY
- Bohemia CDP, NY
- Brentwood CDP, NY
- Bridgehampton CDP, NY
- Brightwaters village, NY
- Brookhaven CDP, NY
- Calverton CDP, NY
- Captree CDP, NY
- Centereach CDP, NY
- Center Moriches CDP, NY
- Centerport CDP, NY
- Central Islip CDP, NY
- Cold Spring Harbor CDP, NY
- Commack CDP, NY
- Copiague CDP, NY
- Coram CDP, NY
- Cutchogue CDP, NY
- Deer Park CDP, NY
- Dering Harbor village, NY
Areas sharing the mapped boundary
These areas touch this mapped boundary.
- Greater Bridgeport Planning Region, Connecticut
- Lower Connecticut River Valley Planning Region, Connecticut
- South Central Connecticut Planning Region, Connecticut
- Southeastern Connecticut Planning Region, Connecticut
- Western Connecticut Planning Region, Connecticut
- Nassau County, New York
- Washington County, Rhode Island
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.