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ZIP Code Database - Facts & Stats

Data Last Updated: February 1, 2023

ZIP Codes for City of Smithfield, NC

Smithfield, NC Covers 1 ZIP Code

ZIP CodeTypeCountyPopulation
ZIP Code 27577StandardJohnston22,911

Timezone(s):Eastern (GMT -05:00)
Population:10,966 (More Details)
Male Population:5,079
Female Population:5,887
Median Age:42
ZIP Codes:1
Area Codes:2
Total Area:796 square miles (county)
Land Area:791 square miles (county)
Water Area:4 square miles (county)

Smithfield, NC Demographic Information *

Total population10,966
Male population5,079
Female population5,887
Median age (years)41.6
White Population6,243
Black Population2,986
Indian Population53
Asian Population88
Hawaiian Population7
Hispanic Population2,114
Median age (Male)38.2
Median age (Female)45.2
Total households4,363
Family households (families)2,632
Average household size2.35
Average family size3.03
Total housing units4,834
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 2/1/2023],
  2. Internal Data Creation [Last Updated: 2/1/2023],
  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],