Last official estimated population of Putnam County was 5,994 (year 2014)[1]. This was 0.002% of total US population and 0% of total Illinois state population. Area of Putnam County is 172.2 mi² (=446.1 km²), in this year population density was 34.80 p/mi². If population growth rate would be same as in period 2010-2014 (-0.05%/yr), Putnam County population in 2026 would be 5,958 [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] +4.99 %/yr
[1840-1850] +6.3 %/yr
[1850-1860] +3.6 %/yr
[1860-1870] +1.18 %/yr
[1870-1880] -1.22 %/yr
[1880-1890] -1.59 %/yr
[1890-1900] +0.03 %/yr
[1900-1910] +4.77 %/yr
[1910-1920] +0.02 %/yr
[1920-1930] -3.63 %/yr
[1930-1940] +0.1 %/yr
[1940-1950] -1.08 %/yr
[1950-1960] -0.38 %/yr
[1960-1970] +0.92 %/yr
[1970-1980] +1.97 %/yr
[1980-1990] -0.6 %/yr
[1990-2000] +0.59 %/yr
[2000-2005] -0.33 %/yr
[2005-2010] +0.1 %/yr
[2010-2014] -0.05 %/yr
Looking for settlements in Putnam County? Visit this page: Settlements in Putnam County, IL
Population of Putnam County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 157 | 115 | 272 |
| 5 to 9 | 166 | 143 | 309 |
| 10 to 14 | 205 | 183 | 388 |
| 15 to 19 | 172 | 154 | 326 |
| 20 to 24 | 183 | 140 | 323 |
| 25 to 29 | 126 | 136 | 262 |
| 30 to 34 | 169 | 151 | 320 |
| 35 to 39 | 154 | 156 | 310 |
| 40 to 44 | 173 | 142 | 315 |
| 45 to 49 | 159 | 192 | 351 |
| 50 to 54 | 237 | 240 | 477 |
| 55 to 59 | 267 | 246 | 513 |
| 60 to 64 | 258 | 239 | 497 |
| 65 to 69 | 187 | 193 | 380 |
| 70 to 74 | 151 | 154 | 305 |
| 75 to 79 | 90 | 103 | 193 |
| 80 to 84 | 60 | 66 | 126 |
| 85+ | 46 | 101 | 147 |
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 |
| WAC | 2914 | 2815 | 5,729 |
| WA | 2888 | 2784 | 5,672 |
| NH | 2804 | 2739 | 5,543 |
| NHWAC | 2762 | 2701 | 5,463 |
| NHWA | 2738 | 2672 | 5,410 |
| H | 156 | 115 | 271 |
| HWAC | 152 | 114 | 266 |
| HWA | 150 | 112 | 262 |
| BAC | 51 | 32 | 83 |
| NHBAC | 49 | 31 | 80 |
| TOM | 26 | 31 | 57 |
| NHTOM | 24 | 29 | 53 |
| BA | 37 | 15 | 52 |
| NHBA | 36 | 15 | 51 |
| IAC | 10 | 21 | 31 |
| AAC | 10 | 19 | 29 |
| NHAAC | 10 | 19 | 29 |
| NHIAC | 7 | 19 | 26 |
| AA | 5 | 12 | 17 |
| NHAA | 5 | 12 | 17 |
| IA | 4 | 11 | 15 |
| NHIA | 1 | 10 | 11 |
| HIAC | 3 | 2 | 5 |
| HIA | 3 | 1 | 4 |
| HTOM | 2 | 2 | 4 |
| NAC | 2 | 1 | 3 |
| HBAC | 2 | 1 | 3 |
| NHNAC | 1 | 1 | 2 |
| HNAC | 1 | 0 | 1 |
| HBA | 1 | 0 | 1 |
| NA | 0 | 1 | 1 |
| NHNA | 0 | 1 | 1 |
| HNA | 0 | 0 | 0 |
| HAAC | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
• Peoria County population
37.6 mi, 
220°
• LaSalle County
23.6 mi, 
65°
• Henry County
44.5 mi, 
283°
• Grundy County
47.1 mi, 
82°
• Livingston County
44.2 mi, 
118°
• Woodford County
28.6 mi, 
170°
• Lee County
37.9 mi, 
359°
• Bureau County
18.4 mi, 
319°
• Marshall County
11.8 mi, 
191°
• Stark County
26.9 mi, 
254°
[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
See note 7 Illinois Notes
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