There are 28 zip codes in Merrimack County, New Hampshire. The most populated is 3301, located in Concord. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
03301Concord33,986
03303Concord16,118
03106Hooksett14,654
03275Suncook12,028
03235Franklin8,827
03276Tilton8,811
03304Bow8,235
03242Henniker6,094
03229Contoocook5,925
03307Loudon5,638
03234Epsom4,846
03257New London4,381
03263Pittsfield4,093
03278Warner3,003
03046Dunbarton3,000
03258Chichester2,659
03224Canterbury2,343
03221Bradford2,263
03216Andover2,041
03255Newbury1,899
03268Salisbury1,507
03287Wilmot1,502
03230Danbury1,491
03260North Sutton995
03243Hill902
03273South Sutton309
03233Elkins209
03231East Andover110
showing: 28 rows

Merrimack County, New Hampshire Zip Codes by Population (2024)