Last official estimated population of Lafayette County was 16,793 (year 2014)[1]. This was 0.005% of total US population and 0.3% of total Wisconsin state population. Area of Lafayette County is 634.6 mi² (=1643.5 km²), in this year population density was 26.46 p/mi². If population growth rate would be same as in period 2010-2014 (-0.06%/yr), Lafayette County population in 2024 would be 16,686 [0].
Historical population of Lafayette County for period 1850-2014 [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
[1850-1860] +4.63 %/yr
[1860-1870] +2.25 %/yr
[1870-1880] -0.63 %/yr
[1880-1890] -0.49 %/yr
[1890-1900] +0.34 %/yr
[1900-1910] -0.43 %/yr
[1910-1920] -0.04 %/yr
[1920-1930] -0.7 %/yr
[1930-1940] +0.02 %/yr
[1940-1950] -0.3 %/yr
[1950-1960] +0 %/yr
[1960-1970] -0.38 %/yr
[1970-1980] -0.03 %/yr
[1980-1990] -0.8 %/yr
[1990-2000] +0.05 %/yr
[2000-2005] +0.68 %/yr
[2005-2010] +0.16 %/yr
[2010-2014] -0.06 %/yr
Looking for settlements in Lafayette County? Visit this page: Settlements in Lafayette County, WI
Population of Lafayette County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 547 | 530 | 1,077 |
| 5 to 9 | 610 | 601 | 1,211 |
| 10 to 14 | 602 | 598 | 1,200 |
| 15 to 19 | 583 | 501 | 1,084 |
| 20 to 24 | 531 | 487 | 1,018 |
| 25 to 29 | 457 | 395 | 852 |
| 30 to 34 | 508 | 474 | 982 |
| 35 to 39 | 429 | 429 | 858 |
| 40 to 44 | 450 | 441 | 891 |
| 45 to 49 | 559 | 515 | 1,074 |
| 50 to 54 | 659 | 684 | 1,343 |
| 55 to 59 | 685 | 660 | 1,345 |
| 60 to 64 | 599 | 544 | 1,143 |
| 65 to 69 | 441 | 348 | 789 |
| 70 to 74 | 301 | 336 | 637 |
| 75 to 79 | 258 | 293 | 551 |
| 80 to 84 | 186 | 240 | 426 |
| 85+ | 141 | 231 | 372 |
Lafayette 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 |
| WAC | 8403 | 8190 | 16,593 |
| WA | 8360 | 8134 | 16,494 |
| NH | 8173 | 8039 | 16,212 |
| NHWAC | 8086 | 7947 | 16,033 |
| NHWA | 8047 | 7895 | 15,942 |
| H | 373 | 268 | 641 |
| HWAC | 317 | 243 | 560 |
| HWA | 313 | 239 | 552 |
| IAC | 89 | 67 | 156 |
| BAC | 57 | 54 | 111 |
| IA | 68 | 41 | 109 |
| TOM | 47 | 59 | 106 |
| AAC | 43 | 57 | 100 |
| NHTOM | 43 | 55 | 98 |
| NHBAC | 47 | 49 | 96 |
| NHAAC | 41 | 55 | 96 |
| NHIAC | 41 | 45 | 86 |
| AA | 31 | 45 | 76 |
| NHAA | 29 | 43 | 72 |
| HIAC | 48 | 22 | 70 |
| BA | 40 | 28 | 68 |
| HIA | 45 | 21 | 66 |
| NHBA | 31 | 26 | 57 |
| NHIA | 23 | 20 | 43 |
| HBAC | 10 | 5 | 15 |
| HBA | 9 | 2 | 11 |
| HTOM | 4 | 4 | 8 |
| HAA | 2 | 2 | 4 |
| HAAC | 2 | 2 | 4 |
| NAC | 2 | 0 | 2 |
| NHNAC | 2 | 0 | 2 |
| HNAC | 0 | 0 | 0 |
| NHNA | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
| NA | 0 | 0 | 0 |
• Dane County population
46 mi, 
51°
• Dubuque County
40.3 mi, 
250°
• Grant County
32.2 mi, 
297°
• Stephenson County
31.7 mi, 
131°
• Green County
26.7 mi, 
87°
• Iowa County
23.9 mi, 
359°
• Jo Daviess County
20.7 mi, 
191°
• Jackson County
40.8 mi, 
213°
• Richland County
52.1 mi, 
342°
• Carroll County
41.7 mi, 
165°
[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
*Iowa Wisconsin Notes
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