The United States Census Bureau has recorded the population of the City of North Augusta and Aiken County in the decennial years 1950 through 2000. The figures for 2001 through 2007 are Census Bureau Estimates for July 1 of the year shown.
| Year |
City of North Augusta |
Aiken County |
| 1950 |
3,659 |
53,137 |
| 1960 |
10,348 |
81,038 |
| 1970 |
12,883 |
91,023 |
| 1980 |
13,593 |
105,625 |
| 1990 |
15,684 |
120,940 |
| 2000 |
17,574 |
142,552 |
| 2001 |
17,802 |
143,673 |
| 2002 |
18,150 |
145,197 |
| 2003 |
18,500 |
146,586 |
| 2004 |
19,090 |
148,592 |
| 2005 |
19,463 |
150,053 |
| 2006 |
19,723 |
150,220 |
| 2007 |
20,131 |
152,307 |