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Where am ILOCATED

Onslow County, North Carolina

Onslow County, North Carolina, has 217,175 residents (July 2025 estimate). Its county seat is Jacksonville. It uses Eastern Time and covers 762 sq mi (1,974 km²) of land.

CharlotteRaleighGreensboro
Onslow County in North Carolina
Duplin CountyPender CountyJacksonvillePiney GreenHalf MoonHolly RidgeSurf City
Onslow County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
217,175
Land area
762 sq mi (1,974 km²)
County seat or government
Jacksonville
Time zone
Eastern TimeUTC-05:00 in January; UTC-04:00 in July
Median household income
$68,148 ± $2,456
Median home value
$236,400 ± $5,122
Median rent, with utilities
$1,265 ± $40
Homes lived in by their owners
63.7% ± 1.4 points
County type
County
Metro or micro area
Jacksonville, NC metro areaCentral county
Water area
143 sq mi (371 km²)
State
North Carolina
County code (FIPS)
37133
Coordinates (central point)
34.763109, -77.499469
Open this point in the location finder

These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Onslow County

Time zoneLocal time and UTC offsetNext clock change
Eastern TimeAmerica/New_YorkUTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock.Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

  1. 2854049,141 people
  2. 2854647,256 people
  3. 2854721,346 people
  4. 2857420,990 people
  5. 2853918,351 people
  6. 2858414,939 people
  7. 2846013,532 people
  8. 2844510,797 people
  9. 285187,651 people
  10. 285726,658 people
  11. 285436,069 people
  12. 285555,914 people
All 17
  1. 285444,386 people
  2. 285423,508 people
  3. 284542,895 people
  4. 285821,658 people
  5. 285211,593 people

17 ZIP Code areas overlap Onslow County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

Townships in Onslow County, largest first

  1. Jacksonville Township69,640 people
  2. Stump Sound Township29,208 people
  3. Richlands Township28,039 people
  4. White Oak Township23,412 people
  5. Swansboro Township23,248 people

People counts are American Community Survey 2020–2024 5-year estimates. All townships in North Carolina, by county

School districts in Onslow County, largest first

  1. Onslow County Schools173,574 people
  2. Camp Lejeune Schools34,332 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

  1. Jacksonville, North Carolina (city)71,279 people
  2. Piney Green, North Carolina (CDP)14,078 people
  3. Half Moon, North Carolina (CDP)7,378 people
  4. Holly Ridge, North Carolina (town)4,904 people
  5. Surf City, North Carolina (town)4,396 people
  6. Swansboro, North Carolina (town)3,997 people
  7. Sneads Ferry, North Carolina (CDP)2,728 people
  8. Richlands, North Carolina (town)2,335 people
  9. Pumpkin Center, North Carolina (CDP)1,636 people
  10. North Topsail Beach, North Carolina (town)784 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Jones County, North Carolina20 mi northeast
  2. Duplin County, North Carolina27 mi northwest
  3. Pender County, North Carolina28 mi southwest
  4. Carteret County, North Carolina55 mi east

Before using this answer on a form

Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.

Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.