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Zip Code 03031 — Amherst, NH

03031 is a ZIP Code associated with Amherst, NH, located within Hillsborough. The postal region supports an estimated population of 11,849 residents across Data Pending housing units, with a population density of 134.9 people per square mile.

WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (42.870560, -71.606830)

Data Metric	Local Statistic
Postal / Zip Code	03031
Primary City	Amherst
State / Province	NH
County	Hillsborough
Total Population	11,849
Median Household Income	Data Pending
Total Housing Units	Data Pending
Population Density	134.9 people/sq mi
Timezone	America/New_York

How 03031 Compares

Metric	ZIP 03031	Hillsborough County	NH State Average
Population	11,849	426,425	1,394,951
Median Income	Data Pending	N/A	N/A
Population Density	134.9 /sq mi	--	--

Nearby ZIP Codes

ZIP Code	City	Distance	Population	Median Income
Zip 03057	Mont Vernon	4.6 mi	2,709	N/A
Zip 03054	Merrimack	4.6 mi	28,176	N/A
Zip 03055	Milford	5.0 mi	16,337	N/A
Zip 03110	Bedford	6.2 mi	23,746	N/A
Zip 03063	Nashua	7.7 mi	15,805	N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →