New Hampshire County Map
Labeled county boundary map and complete directory of all 10 counties in New Hampshire (NH, State FIPS 33). View 5-digit FIPS codes, county seats, land area in square miles, and official county government websites below.
Showing all 10 counties in New Hampshire. Use the search box below to filter by county name, 5-digit FIPS code, or county seat.
New Hampshire County Statistics & Summary
Total Counties
10
Largest by Land Area
Coos County
Smallest by Land Area
Strafford County
All 10 Counties in New Hampshire (FIPS, County Seat & Official Website)
| County Name | 5-Digit FIPS | Seat / Administrative Center | Land Area (sq mi) | Coordinates | Official Website |
|---|---|---|---|---|---|
| Belknap County | 33001 | Laconia | 401.9 | 43.519°, -71.425° | Official Site |
| Carroll County | 33003 | Ossipee | 931.9 | 43.868°, -71.202° | Official Site |
| Cheshire County | 33005 | Keene | 706.7 | 42.925°, -72.249° | Official Site |
| Coos County | 33007 | Lancaster | 1,794.6 | 44.653°, -71.289° | Official Site |
| Grafton County | 33009 | Haverhill | 1,708.6 | 43.926°, -71.842° | Official Site |
| Hillsborough County | 33011 | Manchester | 876.5 | 42.911°, -71.723° | Official Site |
| Merrimack County | 33013 | Concord | 932.9 | 43.300°, -71.680° | Official Site |
| Rockingham County | 33015 | Brentwood | 695.6 | 42.989°, -71.099° | Official Site |
| Strafford County | 33017 | Dover | 367.5 | 43.293°, -71.036° | Official Site |
| Sullivan County | 33019 | Newport | 537.9 | 43.361°, -72.222° | Official Site |
How New Hampshire Counties and 5-Digit FIPS Codes Work
In U.S. Census Bureau TIGER/Line geography, New Hampshire (NH) is assigned the 2-digit state Federal Information Processing Series (FIPS) code 33 and covers 8,954 square miles of land area across 10 counties in the Eastern Time (ET) zone (with Concord as the state capital). Every county in the directory above carries a unique 5-digit GEOID formed by combining state prefix 33 with a 3-digit county code (ranging alphabetically from Belknap County at 33001 to Sullivan County at 33019).
Because U.S. Postal Service 5-digit ZIP Codes follow mail carrier delivery routes rather than local government borders, many postal addresses in New Hampshire carry a neighboring city’s mailing name or sit inside a multi-county ZIP Code Tabulation Area (ZCTA). Property tax assessments, deed recording, circuit and county court venue, voter registration precincts, sheriff jurisdiction, and county sales tax rates in New Hampshire are determined by the legal county boundary shown on the map above rather than the postal city name on an envelope.
Land area figures in square miles and internal centroid coordinates (INTPTLAT, INTPTLON) come directly from the U.S. Census Bureau’s current TIGERweb State_County benchmark, while 10 administrative seats and 10 verified official government websites are cross-referenced from Wikidata (CC0). Need a clean outline worksheet without county labels, or want to verify which New Hampshire county a specific home or business address sits in? Open the Blank Map of New Hampshire, run a street-segment check on Address to County Lookup, check multi-county postal overlap on ZIP Code to County Lookup, or browse all 50 states on the National U.S. County Map.
Adjacent State County Maps
Explore county maps and FIPS directories for states bordering New Hampshire: