Last official estimated population of Cass County was 39,002 (year 2014)[1]. This was 0.012% of total US population and 0.6% of total Indiana state population. Area of Cass County is 414.8 mi² (=1074.5 km²), in this year population density was 94.02 p/mi². If population growth rate would be same as in period 2010-2014 (+0.02%/yr), Cass County population in 2026 would be 39,110 [0].
Historical population of Cass 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] +16.78 %/yr
[1840-1850] +7.24 %/yr
[1850-1860] +4.33 %/yr
[1860-1870] +3.69 %/yr
[1870-1880] +1.33 %/yr
[1880-1890] +1.21 %/yr
[1890-1900] +1.04 %/yr
[1900-1910] +0.52 %/yr
[1910-1920] +0.53 %/yr
[1920-1930] -1.04 %/yr
[1930-1940] +0.67 %/yr
[1940-1950] +0.5 %/yr
[1950-1960] +0.54 %/yr
[1960-1970] -0.12 %/yr
[1970-1980] +0.12 %/yr
[1980-1990] -0.63 %/yr
[1990-2000] +0.64 %/yr
[2000-2005] -0.64 %/yr
[2005-2010] -0.34 %/yr
[2010-2014] +0.02 %/yr
Looking for settlements in Cass County? Visit this page: Settlements in Cass County, IN
Population of Cass County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1241 | 1271 | 2,512 |
| 5 to 9 | 1278 | 1195 | 2,473 |
| 10 to 14 | 1333 | 1238 | 2,571 |
| 15 to 19 | 1464 | 1170 | 2,634 |
| 20 to 24 | 1283 | 1081 | 2,364 |
| 25 to 29 | 1022 | 1015 | 2,037 |
| 30 to 34 | 1134 | 1158 | 2,292 |
| 35 to 39 | 1215 | 1132 | 2,347 |
| 40 to 44 | 1298 | 1221 | 2,519 |
| 45 to 49 | 1320 | 1211 | 2,531 |
| 50 to 54 | 1402 | 1386 | 2,788 |
| 55 to 59 | 1443 | 1357 | 2,800 |
| 60 to 64 | 1116 | 1228 | 2,344 |
| 65 to 69 | 891 | 994 | 1,885 |
| 70 to 74 | 662 | 782 | 1,444 |
| 75 to 79 | 485 | 674 | 1,159 |
| 80 to 84 | 334 | 500 | 834 |
| 85+ | 292 | 612 | 904 |
Cass 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 | 18115 | 18440 | 36,555 |
| WA | 17858 | 18162 | 36,020 |
| NH | 16368 | 16757 | 33,125 |
| NHWAC | 15592 | 16261 | 31,853 |
| NHWA | 15411 | 16037 | 31,448 |
| H | 2845 | 2468 | 5,313 |
| HWAC | 2523 | 2179 | 4,702 |
| HWA | 2447 | 2125 | 4,572 |
| BAC | 596 | 467 | 1,063 |
| NHBAC | 467 | 328 | 795 |
| BA | 453 | 313 | 766 |
| AAC | 426 | 288 | 714 |
| NHAAC | 390 | 264 | 654 |
| AA | 395 | 252 | 647 |
| NHAA | 364 | 234 | 598 |
| IAC | 311 | 278 | 589 |
| NHBA | 360 | 200 | 560 |
| TOM | 261 | 289 | 550 |
| NHTOM | 184 | 234 | 418 |
| IA | 216 | 175 | 391 |
| HIAC | 211 | 148 | 359 |
| HIA | 170 | 124 | 294 |
| HBAC | 129 | 139 | 268 |
| NHIAC | 100 | 130 | 230 |
| HBA | 93 | 113 | 206 |
| HTOM | 77 | 55 | 132 |
| NHIA | 46 | 51 | 97 |
| NAC | 36 | 48 | 84 |
| NA | 30 | 34 | 64 |
| HNAC | 29 | 35 | 64 |
| HAAC | 36 | 24 | 60 |
| HNA | 27 | 33 | 60 |
| HAA | 31 | 18 | 49 |
| NHNAC | 7 | 13 | 20 |
| NHNA | 3 | 1 | 4 |
• Tippecanoe County population
37.9 mi,
228°
• Howard County
22.5 mi,
145°
• Miami County
16.3 mi,
85°
• Clinton County
31.6 mi,
191°
• Wabash County
29.9 mi,
78°
• White County
26.6 mi,
269°
• Fulton County
21 mi,
12°
• Carroll County
16 mi,
223°
• Tipton County
34.4 mi,
152°
• Pulaski County
26.8 mi,
318°
[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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