Last official estimated population of Marion County was 66,450 (year 2014)[1]. This was 0.021% of total US population and 0.6% of total Ohio state population. Area of Marion County is 404.1 mi² (=1046.6 km²), in this year population density was 164.44 p/mi². If population growth rate would be same as in period 2010-2014 (-0.02%/yr), Marion County population in 2024 would be 66,323 [0].
Historical population of Marion 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] +8.47 %/yr
[1840-1850] -1.56 %/yr
[1850-1860] +2.07 %/yr
[1860-1870] +0.44 %/yr
[1870-1880] +2.42 %/yr
[1880-1890] +1.86 %/yr
[1890-1900] +1.49 %/yr
[1900-1910] +1.71 %/yr
[1910-1920] +2.15 %/yr
[1920-1930] +0.78 %/yr
[1930-1940] -0.12 %/yr
[1940-1950] +1.07 %/yr
[1950-1960] +1.89 %/yr
[1960-1970] +0.72 %/yr
[1970-1980] +0.49 %/yr
[1980-1990] -0.56 %/yr
[1990-2000] +0.3 %/yr
[2000-2005] +0.08 %/yr
[2005-2010] +0.01 %/yr
[2010-2014] -0.02 %/yr
Looking for settlements in Marion County? Visit this page: Settlements in Marion County, OH
Population of Marion County by age groups male (M) and female (F)[1b]
Age Gr. | (M) | (F) | Total |
0 to 4 | 1959 | 1882 | 3,841 |
5 to 9 | 1888 | 1783 | 3,671 |
10 to 14 | 2058 | 1895 | 3,953 |
15 to 19 | 2010 | 1815 | 3,825 |
20 to 24 | 2489 | 1869 | 4,358 |
25 to 29 | 2476 | 1818 | 4,294 |
30 to 34 | 2383 | 1731 | 4,114 |
35 to 39 | 2313 | 1739 | 4,052 |
40 to 44 | 2491 | 1852 | 4,343 |
45 to 49 | 2620 | 2000 | 4,620 |
50 to 54 | 2851 | 2204 | 5,055 |
55 to 59 | 2615 | 2283 | 4,898 |
60 to 64 | 2118 | 2101 | 4,219 |
65 to 69 | 1715 | 1854 | 3,569 |
70 to 74 | 1071 | 1310 | 2,381 |
75 to 79 | 824 | 999 | 1,823 |
80 to 84 | 527 | 844 | 1,371 |
85+ | 463 | 870 | 1,333 |
Marion 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 | 33962 | 30171 | 64,133 |
WAC | 31237 | 29622 | 60,859 |
WA | 30702 | 29079 | 59,781 |
NHWAC | 30446 | 29029 | 59,475 |
NHWA | 29937 | 28520 | 58,457 |
BAC | 3665 | 1283 | 4,948 |
NHBAC | 3577 | 1213 | 4,790 |
BA | 3306 | 921 | 4,227 |
NHBA | 3232 | 873 | 4,105 |
H | 909 | 678 | 1,587 |
HWAC | 791 | 593 | 1,384 |
HWA | 765 | 559 | 1,324 |
TOM | 557 | 563 | 1,120 |
NHTOM | 528 | 529 | 1,057 |
AAC | 264 | 263 | 527 |
IAC | 255 | 239 | 494 |
NHAAC | 245 | 247 | 492 |
NHIAC | 222 | 205 | 427 |
AA | 203 | 196 | 399 |
NHAA | 190 | 183 | 373 |
IA | 85 | 74 | 159 |
HBAC | 88 | 70 | 158 |
HBA | 74 | 48 | 122 |
NHIA | 66 | 54 | 120 |
HIAC | 33 | 34 | 67 |
NAC | 30 | 33 | 63 |
HTOM | 29 | 34 | 63 |
NHNAC | 18 | 29 | 47 |
HIA | 19 | 20 | 39 |
HAAC | 19 | 16 | 35 |
NA | 18 | 16 | 34 |
HAA | 13 | 13 | 26 |
NHNA | 9 | 12 | 21 |
HNAC | 12 | 4 | 16 |
HNA | 9 | 4 | 13 |
• Delaware County population
23 mi, 158°
• Richland County
35.2 mi, 68°
• Hancock County
38.6 mi, 317°
• Seneca County
36.8 mi, 3°
• Union County
22.7 mi, 207°
• Logan County
34.3 mi, 246°
• Crawford County
22.1 mi, 35°
• Morrow County
20 mi, 102°
• Hardin County
26.4 mi, 280°
• Wyandot County
19 mi, 336°
[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
*Delaware Ohio Notes
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