Last official estimated population of Fountain County was 17,258 (year 2014)[1]. This was 0.005% of total US population and 0.3% of total Indiana state population. Area of Fountain County is 397.9 mi² (=1030.5 km²), in this year population density was 43.37 p/mi². If population growth rate would be same as in period 2010-2014 (+0.03%/yr), Fountain County population in 2025 would be 17,308 [0].
Historical population of Fountain County for period 1830-2014 [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

[1830-1840] +3.94 %/yr
[1840-1850] +1.68 %/yr
[1850-1860] +1.62 %/yr
[1860-1870] +0.52 %/yr
[1870-1880] +2.13 %/yr
[1880-1890] -0.34 %/yr
[1890-1900] +0.93 %/yr
[1900-1910] -0.48 %/yr
[1910-1920] -0.82 %/yr
[1920-1930] -0.46 %/yr
[1930-1940] +0.18 %/yr
[1940-1950] -0.26 %/yr
[1950-1960] +0.48 %/yr
[1960-1970] -0.24 %/yr
[1970-1980] +0.42 %/yr
[1980-1990] -0.66 %/yr
[1990-2000] +0.09 %/yr
[2000-2005] -0.59 %/yr
[2005-2010] -0.23 %/yr
[2010-2014] +0.03 %/yr
Looking for settlements in Fountain County? Visit this page: Settlements in Fountain County, IN
Population of Fountain County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 510 | 454 | 964 |
| 5 to 9 | 491 | 471 | 962 |
| 10 to 14 | 563 | 531 | 1,094 |
| 15 to 19 | 602 | 529 | 1,131 |
| 20 to 24 | 523 | 419 | 942 |
| 25 to 29 | 446 | 399 | 845 |
| 30 to 34 | 450 | 457 | 907 |
| 35 to 39 | 447 | 469 | 916 |
| 40 to 44 | 509 | 532 | 1,041 |
| 45 to 49 | 578 | 536 | 1,114 |
| 50 to 54 | 658 | 644 | 1,302 |
| 55 to 59 | 613 | 621 | 1,234 |
| 60 to 64 | 493 | 508 | 1,001 |
| 65 to 69 | 461 | 506 | 967 |
| 70 to 74 | 355 | 405 | 760 |
| 75 to 79 | 314 | 336 | 650 |
| 80 to 84 | 167 | 229 | 396 |
| 85+ | 120 | 312 | 432 |
Fountain 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 | 8208 | 8241 | 16,449 |
| WA | 8122 | 8152 | 16,274 |
| NH | 8074 | 8155 | 16,229 |
| NHWAC | 7999 | 8057 | 16,056 |
| NHWA | 7915 | 7971 | 15,886 |
| H | 226 | 203 | 429 |
| HWAC | 209 | 184 | 393 |
| HWA | 207 | 181 | 388 |
| TOM | 92 | 96 | 188 |
| NHTOM | 90 | 92 | 182 |
| BAC | 72 | 78 | 150 |
| IAC | 64 | 79 | 143 |
| NHIAC | 59 | 73 | 132 |
| NHBAC | 64 | 67 | 131 |
| AAC | 40 | 54 | 94 |
| NHAAC | 39 | 52 | 91 |
| BA | 34 | 37 | 71 |
| IA | 29 | 32 | 61 |
| NHBA | 27 | 30 | 57 |
| AA | 18 | 35 | 53 |
| NHIA | 25 | 27 | 52 |
| NHAA | 17 | 34 | 51 |
| HBAC | 8 | 11 | 19 |
| NAC | 8 | 8 | 16 |
| HBA | 7 | 7 | 14 |
| NA | 5 | 6 | 11 |
| HIAC | 5 | 6 | 11 |
| HNAC | 5 | 5 | 10 |
| HNA | 5 | 5 | 10 |
| HIA | 4 | 5 | 9 |
| NHNAC | 3 | 3 | 6 |
| HTOM | 2 | 4 | 6 |
| HAAC | 1 | 2 | 3 |
| HAA | 1 | 1 | 2 |
| NHNA | 0 | 1 | 1 |
• Tippecanoe County population
25.8 mi,
44°
• Vermilion County
26.4 mi,
279°
• Boone County
40.8 mi,
96°
• Montgomery County
18.9 mi,
107°
• Putnam County
37.4 mi,
147°
• Edgar County
40.9 mi,
221°
• Parke County
24.1 mi,
175°
• Vermillion County
22 mi,
213°
• Benton County
33.4 mi,
352°
• Warren County
17.6 mi,
335°
[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
*Wabash (old) Indiana Notes
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