Zip Code Database List
Account Login
Find ZIP+4 of Address

Find the ZIP Code, County, and +4 of any U.S. Address

FREE ZIP Code Finder

Find info on any U.S. ZIP Code

Other FREE Lookups

Lookup ZIP Code of any City, State, County or Area Code

FREE Radius Search

Find all ZIP Codes

FREE Distance Calc

Calculate the distance between two U.S. or Canadian ZIP codes.

ZIP Code Database - Facts & Stats

Data Last Updated: June 1, 2022

ZIP Codes for City of Newmarket, NH

Newmarket, NH Covers 1 ZIP Code

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 03857StandardRockingham9,006603

Timezone(s):Eastern (GMT -05:00)
Population:5,297 (More Details)
Male Population:2,623
Female Population:2,674
Median Age:32
ZIP Codes:1
Area Codes:1
Total Area:795 square miles (county)
Land Area:695 square miles (county)
Water Area:100 square miles (county)

Newmarket, NH Demographic Information *

Total population5,297
Male population2,623
Female population2,674
Median age (years)31.6
White Population4,831
Black Population67
Indian Population14
Asian Population214
Hawaiian Population7
Hispanic Population154
Median age (Male)31
Median age (Female)32.1
Total households2,400
Family households (families)1,178
Average household size2.21
Average family size2.82
Total housing units2,594
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 6/1/2022],
  2. Internal Data Creation [Last Updated: 6/1/2022],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],