Davis County Population 2018
Davis County's estimated population is 347,637 with a growth rate of 1.85% in the past year according to the most recent United States census data. Davis County is the 3rd largest county in Utah.
| Year | Population | Growth | Growth Rate |
| 2017 | 347,637 | 6,308 | 1.85% |
| 2016 | 341,329 | 6,495 | 1.94% |
| 2015 | 334,834 | 6,056 | 1.84% |
| 2014 | 328,778 | 6,472 | 2.01% |
| 2013 | 322,306 | 6,395 | 2.02% |
| 2012 | 315,911 | 4,012 | 1.29% |
| 2011 | 311,899 | 4,001 | 1.30% |
| 2010 | 307,898 | 119,957 | 63.83% |
| 1990 | 187,941 | 41,401 | 28.25% |
| 1980 | 146,540 | 47,512 | 47.98% |
| 1970 | 99,028 | 34,268 | 52.92% |
| 1960 | 64,760 | 33,893 | 109.80% |
| 1950 | 30,867 | 15,083 | 95.56% |
| 1940 | 15,784 | 1,763 | 12.57% |
| 1930 | 14,021 | 2,571 | 22.45% |
| 1920 | 11,450 | 1,259 | 12.35% |
| 1910 | 10,191 | 2,195 | 27.45% |
| 1900 | 7,996 | 1,245 | 18.44% |
| 1890 | 6,751 | 1,472 | 27.88% |
| 1880 | 5,279 | 820 | 18.39% |
| 1870 | 4,459 | 1,555 | 53.55% |
| 1860 | 2,904 | 1,770 | 156.08% |
| 1850 | 1,134 | 0.00% |