Last official estimated population of Putnam County was 37,928 (year 2014)[1]. This was 0.012% of total US population and 0.6% of total Indiana state population. Area of Putnam County is 482.7 mi² (=1250.2 km²), in this year population density was 78.58 p/mi². If population growth rate would be same as in period 2010-2014 (-0.02%/yr), Putnam County population in 2021 would be 37,867 [0].
Historical population of Putnam 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] +7.38 %/yr
[1840-1850] +1.01 %/yr
[1850-1860] +1.06 %/yr
[1860-1870] +0.4 %/yr
[1870-1880] +0.45 %/yr
[1880-1890] -0.07 %/yr
[1890-1900] -0.39 %/yr
[1900-1910] -0.46 %/yr
[1910-1920] -0.32 %/yr
[1920-1930] +0.28 %/yr
[1930-1940] +0.19 %/yr
[1940-1950] +0.97 %/yr
[1950-1960] +0.83 %/yr
[1960-1970] +0.78 %/yr
[1970-1980] +0.8 %/yr
[1980-1990] +0.39 %/yr
[1990-2000] +1.75 %/yr
[2000-2005] +0.94 %/yr
[2005-2010] +0.1 %/yr
[2010-2014] -0.02 %/yr
Looking for settlements in Putnam County? Visit this page: Settlements in Putnam County, IN
Population of Putnam County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 922 | 829 | 1,751 |
| 5 to 9 | 1018 | 973 | 1,991 |
| 10 to 14 | 1169 | 1052 | 2,221 |
| 15 to 19 | 1561 | 1555 | 3,116 |
| 20 to 24 | 1998 | 1662 | 3,660 |
| 25 to 29 | 1413 | 865 | 2,278 |
| 30 to 34 | 1320 | 879 | 2,199 |
| 35 to 39 | 1250 | 891 | 2,141 |
| 40 to 44 | 1277 | 1060 | 2,337 |
| 45 to 49 | 1416 | 1128 | 2,544 |
| 50 to 54 | 1542 | 1308 | 2,850 |
| 55 to 59 | 1349 | 1282 | 2,631 |
| 60 to 64 | 1141 | 1055 | 2,196 |
| 65 to 69 | 863 | 948 | 1,811 |
| 70 to 74 | 628 | 735 | 1,363 |
| 75 to 79 | 493 | 608 | 1,101 |
| 80 to 84 | 329 | 435 | 764 |
| 85+ | 243 | 421 | 664 |
Putnam 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 | 19530 | 17382 | 36,912 |
| WAC | 18334 | 17174 | 35,508 |
| WA | 18136 | 16973 | 35,109 |
| NHWAC | 17980 | 16901 | 34,881 |
| NHWA | 17804 | 16715 | 34,519 |
| BAC | 1438 | 330 | 1,768 |
| NHBAC | 1403 | 316 | 1,719 |
| BA | 1327 | 235 | 1,562 |
| NHBA | 1307 | 227 | 1,534 |
| H | 402 | 304 | 706 |
| HWAC | 354 | 273 | 627 |
| HWA | 332 | 258 | 590 |
| AAC | 228 | 238 | 466 |
| NHAAC | 217 | 233 | 450 |
| TOM | 214 | 207 | 421 |
| NHTOM | 187 | 192 | 379 |
| AA | 177 | 196 | 373 |
| NHAA | 170 | 191 | 361 |
| IAC | 139 | 145 | 284 |
| NHIAC | 111 | 119 | 230 |
| IA | 69 | 69 | 138 |
| NHIA | 57 | 51 | 108 |
| HIAC | 28 | 26 | 54 |
| HBAC | 35 | 14 | 49 |
| HTOM | 27 | 15 | 42 |
| NAC | 16 | 16 | 32 |
| HIA | 12 | 18 | 30 |
| HBA | 20 | 8 | 28 |
| NHNAC | 11 | 15 | 26 |
| HAAC | 11 | 5 | 16 |
| NA | 9 | 6 | 15 |
| HAA | 7 | 5 | 12 |
| NHNA | 5 | 6 | 11 |
| HNAC | 5 | 1 | 6 |
| HNA | 4 | 0 | 4 |
• Hendricks County population
19.6 mi, 
68°
• Vigo County
32.9 mi, 
240°
• Morgan County
25 mi, 
120°
• Boone County
33.5 mi, 
37°
• Montgomery County
26 mi, 
355°
• Clay County
23.4 mi, 
216°
• Owen County
24.1 mi, 
178°
• Parke County
19.7 mi, 
292°
• Fountain County
37.4 mi, 
327°
• Vermillion County
34.9 mi, 291°
[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), Owen Indiana Notes
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