The following sites in Onslow County are listed with the National Register of Historic Places. The date following each place is the listed date.
- Alum Spring (Catherine Lake) 1/31/1990
- Avirett-Stephens Plantation (Richlands vicinity) 4/18/1991
- Bank of Onslow and Jacksonville Masonic Temple (Jacksonville) 11/13/1989
- Catherine Lake Historic District (Catherine Lake) 11/13/1989
- Futral Family Farm (Fountain vicinity) 11/13/1989
- William Edward Mattocks House (Swansboro) 3/22/1989
- Mill Avenue Historic District (Jacksonville) 3/16/1990
- Palo Alto Plantation (Belgrade vicinity) 10/10/1979
- Pelletier House and Wantland Spring (Jacksonville) 11/13/1989
- Richlands Historic District (Richlands) 3/16/1990
- Southwest Historic District (Waltons Store vicinity) 11/13/1989
- Swansboro Historic District (Swansboro) 3/16/1990
- Taylor Farm (Richlands vicinity) 1/27/1999
- Venters Farm Historic District (Richlands vicinity) 5/7/1987
- Yopps Meeting House (Sneads Ferry vicinity) 7/22/1999