New Hampshire County Maps
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New Hampshire has 10 counties, a population of more than 1 million people, about 246 zip codes and 93 public school districts. Those counties vary widely in population, school enrollment, zip code coverage and local boundary structure. Hillsborough County has the largest population in the state, while Coos County has the smallest. Browse the map, population, zip codes, school districts, subdivisions and county list sections below to explore further. Or, simply start typing in the box below to go directly to that county.
Interactive New Hampshire County Map
This New Hampshire county map preview highlights population-by-county context, ZIP code coverage, school districts, and local boundary structure. Full statewide and county-level data packages are available when you need complete downloadable datasets. Click or tap any county to view its maps, trends and data.
Start with a free preview, or go straight to the full New Hampshire dataset .
New Hampshire Population By County
New Hampshire's population was over 1 million in 2020, up 61,059 (4.64%) residents from 2010. Hillsborough County had the largest population in the state with 422,937 people. Rockingham and Merrimack Counties also stand out as major population centers. Coos County was the least populated area in New Hampshire with only 31,268 residents. The table below compares New Hampshire county populations and recent population trends.
The Most Populated Counties In New Hampshire
| County | Population | Trend (2010-2020) |
|---|---|---|
| Hillsborough County | 422,937 | ▴ 5.54% |
| Rockingham County | 314,176 | ▴ 6.42% |
| Merrimack County | 153,808 | ▴ 5.03% |
| Strafford County | 130,889 | ▴ 6.29% |
| Grafton County | 91,118 | ▴ 2.24% |
| Download all county population data | ||
County populations reflect the latest state serving context (2020).
New Hampshire County Map With ZIP Codes
New Hampshire has about 246 zip codes statewide. Rockingham County contains the most zip codes, with 36. County-level zip code maps give a faster and clearer way to understand local coverage as zip boundaries can span county and municipal lines. The maps below highlight a few New Hampshire counties.
New Hampshire School Districts By County
New Hampshire has 93 public school districts with 130,457 students enrolled as of 2024. Hillsborough County stands out for both district count and total enrollment. The table below compares county level school district totals and recent enrollment trends across the state.
Largest School Districts in New Hampshire
| County | Districts | Enrollment | Trend |
|---|---|---|---|
| Hillsborough County | 14 | 43,787 | ▾ 1.34% |
| Merrimack County | 11 | 16,433 | ▾ 1.99% |
| Grafton County | 11 | 5,510 | ▾ 2.87% |
| Coos County | 11 | 2,909 | ▾ 3.99% |
| Rockingham County | 9 | 20,221 | ▾ 1.99% |
| Download all school district data | |||
School district enrollment and trend values reflect the most recent state-level context (2024).
New Hampshire County Map With Subdivisions
New Hampshire has about 260 local subdivisions statewide. These boundaries add another layer of detail within counties and help show how local subdivision lines fit inside county boundaries. The previews below highlight a few New Hampshire counties with subdivision map coverage.
Get the Full New Hampshire Data Package
The sections above provide a preview of New Hampshire county maps and county-level data. The full package includes complete statewide coverage with ready-to-use files for mapping, planning, and analysis.
Everything is organized to save hours of data collection, cleanup, and integration work.
- County map exports and boundary coverage for every county in New Hampshire
- Statewide GIS layers for ZIP codes, subdivisions, school districts, roads, water, and political boundaries
- Population, demographics, school, housing, and trend context aligned across counties
- Database files, map-ready exports, and documentation designed for faster research workflows
Includes GIS layers, maps, demographics, analytics, database files and planning tools.