Last official estimated population of Delaware County was 175,108 (year 2014)[1]. This was 0.055% of total US population and 1.5% of total Ohio state population. Area of Delaware County is 457.3 mi² (=1184.5 km²), in this year population density was 382.89 p/mi². If population growth rate would be same as in period 2010-2014 (+0.13%/yr), Delaware County population in 2026 would be 177,818 [0].
Historical population of Delaware County for period 1810-2014 [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
[1810-1820] +14.34 %/yr
[1820-1830] +4.18 %/yr
[1830-1840] +6.73 %/yr
[1840-1850] -0.11 %/yr
[1850-1860] +0.92 %/yr
[1860-1870] +0.52 %/yr
[1870-1880] +0.84 %/yr
[1880-1890] -0.07 %/yr
[1890-1900] -0.29 %/yr
[1900-1910] +0.29 %/yr
[1910-1920] -0.44 %/yr
[1920-1930] +0 %/yr
[1930-1940] +0.29 %/yr
[1940-1950] +1.24 %/yr
[1950-1960] +1.78 %/yr
[1960-1970] +1.74 %/yr
[1970-1980] +2.3 %/yr
[1980-1990] +2.2 %/yr
[1990-2000] +5.09 %/yr
[2000-2005] +6.28 %/yr
[2005-2010] +3.15 %/yr
[2010-2014] +0.13 %/yr
Looking for settlements in Delaware County? Visit this page: Settlements in Delaware County, OH
Population of Delaware County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 6085 | 5495 | 11,580 |
| 5 to 9 | 7897 | 7346 | 15,243 |
| 10 to 14 | 8462 | 8054 | 16,516 |
| 15 to 19 | 7041 | 6487 | 13,528 |
| 20 to 24 | 4829 | 4576 | 9,405 |
| 25 to 29 | 3750 | 4129 | 7,879 |
| 30 to 34 | 5461 | 6071 | 11,532 |
| 35 to 39 | 6748 | 7093 | 13,841 |
| 40 to 44 | 8032 | 8129 | 16,161 |
| 45 to 49 | 7427 | 7401 | 14,828 |
| 50 to 54 | 7128 | 7107 | 14,235 |
| 55 to 59 | 6033 | 6258 | 12,291 |
| 60 to 64 | 5069 | 5208 | 10,277 |
| 65 to 69 | 3879 | 4177 | 8,056 |
| 70 to 74 | 2433 | 2934 | 5,367 |
| 75 to 79 | 1616 | 1966 | 3,582 |
| 80 to 84 | 1039 | 1388 | 2,427 |
| 85+ | 790 | 1575 | 2,365 |
Delaware 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 | 91354 | 93209 | 184,563 |
| WAC | 84893 | 86640 | 171,533 |
| WA | 83258 | 85005 | 168,263 |
| NHWAC | 82754 | 84625 | 167,379 |
| NHWA | 81206 | 83080 | 164,286 |
| AAC | 5731 | 5868 | 11,599 |
| NHAAC | 5668 | 5818 | 11,486 |
| AA | 5065 | 5211 | 10,276 |
| NHAA | 5017 | 5179 | 10,196 |
| BAC | 4206 | 4033 | 8,239 |
| NHBAC | 4068 | 3893 | 7,961 |
| BA | 3419 | 3214 | 6,633 |
| NHBA | 3331 | 3130 | 6,461 |
| H | 2365 | 2185 | 4,550 |
| HWAC | 2139 | 2015 | 4,154 |
| HWA | 2052 | 1925 | 3,977 |
| TOM | 1723 | 1737 | 3,460 |
| NHTOM | 1624 | 1637 | 3,261 |
| IAC | 609 | 596 | 1,205 |
| NHIAC | 496 | 519 | 1,015 |
| IA | 208 | 191 | 399 |
| NHIA | 138 | 155 | 293 |
| HBAC | 138 | 140 | 278 |
| NAC | 99 | 100 | 199 |
| HTOM | 99 | 100 | 199 |
| HIAC | 113 | 77 | 190 |
| HBA | 88 | 84 | 172 |
| NHNAC | 84 | 84 | 168 |
| HAAC | 63 | 50 | 113 |
| HIA | 70 | 36 | 106 |
| NA | 46 | 36 | 82 |
| HAA | 48 | 32 | 80 |
| NHNA | 38 | 28 | 66 |
| HNAC | 15 | 16 | 31 |
| HNA | 8 | 8 | 16 |
• Franklin County population
21.4 mi, 
179°
• Licking County
30.6 mi, 
114°
• Marion County
23 mi, 
338°
• Knox County
32 mi, 
74°
• Union County
19 mi, 
273°
• Logan County
40.7 mi, 
280°
• Crawford County
39.6 mi, 
6°
• Madison County
33.6 mi, 
218°
• Champaign County
41.4 mi, 
255°
• Morrow County
20.3 mi, 
32°
[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
*Ross Ohio Notes
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