Last official estimated population of Louisa County was 33,348 (year 2014)[1]. This was 0.01% of total US population and 0.4% of total Virginia state population. Area of Louisa County is 510.9 mi² (=1323.2 km²), in this year population density was 65.28 p/mi². If population growth rate would be same as in period 2010-2014 (+0.15%/yr), Louisa County population in 2026 would be 33,940 [0].
Historical population of Louisa County for period 1790-2014 [1] , [2] , [3]:
Estimated population for 2014[1]. Population density is in p./sq.mi [4]. Changes are for period 2010-2015. Value is %/year. Boundary lines are approx. 2012 [5]. Click on flag to hide it.
Population • Density • Changes • Legends • Position
[1790-1800] +3.46 %/yr
[1800-1810] +0.01 %/yr
[1810-1820] +1.45 %/yr
[1820-1830] +1.63 %/yr
[1830-1840] -0.45 %/yr
[1840-1850] +0.79 %/yr
[1850-1860] +0.01 %/yr
[1860-1870] -0.22 %/yr
[1870-1880] +1.49 %/yr
[1880-1890] -1.08 %/yr
[1890-1900] -0.29 %/yr
[1900-1910] +0.04 %/yr
[1910-1920] +0.3 %/yr
[1920-1930] -1.76 %/yr
[1930-1940] -0.46 %/yr
[1940-1950] -0.63 %/yr
[1950-1960] +0.1 %/yr
[1960-1970] +0.78 %/yr
[1970-1980] +2.44 %/yr
[1980-1990] +1.32 %/yr
[1990-2000] +2.37 %/yr
[2000-2005] +3.04 %/yr
[2005-2010] +2.13 %/yr
[2010-2014] +0.15 %/yr
Looking for settlements in Louisa County? Visit this page: Settlements in Louisa County, VA
Population of Louisa County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 970 | 952 | 1,922 |
| 5 to 9 | 1041 | 1019 | 2,060 |
| 10 to 14 | 1025 | 1034 | 2,059 |
| 15 to 19 | 966 | 861 | 1,827 |
| 20 to 24 | 855 | 917 | 1,772 |
| 25 to 29 | 950 | 978 | 1,928 |
| 30 to 34 | 951 | 957 | 1,908 |
| 35 to 39 | 995 | 956 | 1,951 |
| 40 to 44 | 1047 | 1040 | 2,087 |
| 45 to 49 | 1191 | 1242 | 2,433 |
| 50 to 54 | 1434 | 1545 | 2,979 |
| 55 to 59 | 1384 | 1424 | 2,808 |
| 60 to 64 | 1258 | 1318 | 2,576 |
| 65 to 69 | 1141 | 1139 | 2,280 |
| 70 to 74 | 762 | 824 | 1,586 |
| 75 to 79 | 503 | 542 | 1,045 |
| 80 to 84 | 296 | 317 | 613 |
| 85+ | 184 | 330 | 514 |
Louisa County resident population estimates by Sex, Race, and Hispanic Origin[1b]. For full list of abbrevations see: population.us/about page.
| Race | Male | Female | Total |
| NH | 16502 | 16973 | 33,475 |
| WAC | 14009 | 14164 | 28,173 |
| WA | 13687 | 13793 | 27,480 |
| NHWAC | 13627 | 13799 | 27,426 |
| NHWA | 13319 | 13458 | 26,777 |
| BAC | 2986 | 3276 | 6,262 |
| NHBAC | 2926 | 3217 | 6,143 |
| BA | 2753 | 2997 | 5,750 |
| NHBA | 2702 | 2954 | 5,656 |
| H | 451 | 422 | 873 |
| TOM | 350 | 399 | 749 |
| HWAC | 382 | 365 | 747 |
| HWA | 368 | 335 | 703 |
| NHTOM | 334 | 368 | 702 |
| IAC | 171 | 174 | 345 |
| NHIAC | 150 | 149 | 299 |
| AAC | 129 | 170 | 299 |
| NHAAC | 124 | 166 | 290 |
| AA | 75 | 124 | 199 |
| NHAA | 73 | 123 | 196 |
| IA | 80 | 74 | 154 |
| NHIA | 66 | 63 | 129 |
| HBAC | 60 | 59 | 119 |
| HBA | 51 | 43 | 94 |
| NAC | 27 | 25 | 52 |
| NHNAC | 26 | 24 | 50 |
| HTOM | 16 | 31 | 47 |
| HIAC | 21 | 25 | 46 |
| HIA | 14 | 11 | 25 |
| NA | 8 | 8 | 16 |
| NHNA | 8 | 7 | 15 |
| HAAC | 5 | 4 | 9 |
| HAA | 2 | 1 | 3 |
| HNAC | 1 | 1 | 2 |
| HNA | 0 | 1 | 1 |
• Spotsylvania County population
21.9 mi, 
48°
• Hanover County
29.5 mi, 
119°
• Albemarle County
32.5 mi, 
276°
• Charlottesville city
29 mi, 278°
• Orange County
19.4 mi, 
351°
• Caroline County
33.3 mi, 
83°
• Powhatan County
29.4 mi, 
174°
• Fluvanna County
20.2 mi, 
240°
• Fredericksburg city
34.2 mi, 48°
• Goochland County
17.7 mi, 172°
[0] Calculated by population.us from last known population growth rate, not official data.
[1] County population - 2014, archived from the original, retrieved 02/23/2016
[1b] Annual County Resident Population Estimates by Age, Sex, Race, and Hispanic Origin, (used only data for 2014) archived from the original, retrieved 02/23/2016
[2] County population - 2000-2010, archived from the original, retrieved 02/23/2016
[3] Population of States and Counties of the United States: 1790 to 1992, PDF, 15 Mb, census.gov, retrieved 02/23/2016
[4] County area, latitude longitude data, retrieved 02/23/2016
[5] County boundaries, CSV files on boundaries.us, retrived 03/18/2016
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