County · code 37133
Onslow CountyNorth Carolina
Onslow County is a county in North Carolina, with Jacksonville as its seat. It was founded in 1734 and named after Arthur Onslow.
- Founded1734
- County seatJacksonville
- Named forArthur Onslow
- Land area762 sq mi + 143 sq mi water
- Population204,576 2020 Census
- Parcels mapped96,563 checked 15 October 2026
Where it is
Onslow on the map of North Carolina
North Carolina has 100 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Founded in 1734
An old deed may name a county that no longer exists, or a boundary that has since moved.
Onslow Precinct was created in 1734 from Carteret Precinct and New Hanover Precinct. In 1739 it became Onslow County by legislative act, though its creation was repealed by the Crown in 1754 and re-created in 1756.
- c. 1734Onslow County created Onslow Precinct (now Onslow) created from Carteret Precinct (now Carteret) and New Hanover Precinct (now New Hanover). · N.C. Recs., 3:450; N.C. Recs., ch. 8, secs. 1-2/23:119-120
- c. 1739Changed Onslow Precinct became Onslow County by legislative act. · N.C. Recs., ch. 3, sec. 22/23: 122-127
- 1754Changed Creation of Onslow Precinct (subsequently Onslow County) repealed by King George Ii, in Privy Council.Ii· N.C. Recs., ch. 9, sec. 1/23:445-446
- c. 1756Onslow County created Onslow re-created by the legislature in response to the Crown Instructions of 1 July 1755 (authorizing reenactment of the creations repealed on 8 April 1754). · N.C. Recs., ch. 9, sec. 2/23:446
Land and parcels
What the maps cover in Onslow
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 96,563 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 31 August 2026 · checked 15 October 2026 -
Address points Official
One point per address, 107,459 in all from NC Center for Geographic Information and Analysis (CGIA, NC Dept of Information Technology) for NC OneMap, with the North Carolina 911 Board (AddressNC program).
checked 14 October 2026 -
Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
Onslow by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Onslow County's official site
We have found the county's site but not its offices yet; start there.
County government
- County government
The official website of Onslow County.
See your own lot on these maps
Open Onslow County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about Onslow County
- When was Onslow County founded?
- Onslow County was founded in 1734, and named after Arthur Onslow.
- What is the county seat of Onslow County?
- The county seat of Onslow County is Jacksonville.
- Is there an online parcel map for Onslow County?
- Yes. A public source publishes a parcel map of 96,563 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Onslow County's boundary or name changed?
- Onslow County was created in 1734. Since then the Atlas of Historical County Boundaries records 3 later changes, most of them small boundary adjustments, chiefly involving Ii County.
- Is my lot in a flood zone?
- We do not have flood maps for Onslow County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby