Last official estimated population of Oswego County was 122,154 (year 2014)[1]. This was 0.038% of total US population and 0.6% of total New York state population. Area of Oswego County is 1,312.1 mi² (=3398.3 km²), in this year population density was 93.10 p/mi². If population growth rate would be same as in period 2010-2014 (+0.01%/yr), Oswego County population in 2026 would be 122,289 [0].
Historical population of Oswego County for period 1820-2014 [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

[1820-1830] +8.16 %/yr
[1830-1840] +4.87 %/yr
[1840-1850] +3.61 %/yr
[1850-1860] +2.02 %/yr
[1860-1870] +0.26 %/yr
[1870-1880] -0 %/yr
[1880-1890] -0.8 %/yr
[1890-1900] -0.14 %/yr
[1900-1910] +0.11 %/yr
[1910-1920] -0.09 %/yr
[1920-1930] -0.2 %/yr
[1930-1940] +0.23 %/yr
[1940-1950] +0.8 %/yr
[1950-1960] +1.1 %/yr
[1960-1970] +1.6 %/yr
[1970-1980] +1.22 %/yr
[1980-1990] +0.67 %/yr
[1990-2000] +0.05 %/yr
[2000-2005] +0.04 %/yr
[2005-2010] -0.09 %/yr
[2010-2014] +0.01 %/yr
Looking for settlements in Oswego County? Visit this page: Settlements in Oswego County, NY
Population of Oswego County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 3451 | 3253 | 6,704 |
| 5 to 9 | 3654 | 3465 | 7,119 |
| 10 to 14 | 3944 | 3657 | 7,601 |
| 15 to 19 | 4554 | 4702 | 9,256 |
| 20 to 24 | 4990 | 4622 | 9,612 |
| 25 to 29 | 3984 | 3535 | 7,519 |
| 30 to 34 | 3367 | 3367 | 6,734 |
| 35 to 39 | 3148 | 3186 | 6,334 |
| 40 to 44 | 3548 | 3698 | 7,246 |
| 45 to 49 | 4394 | 4338 | 8,732 |
| 50 to 54 | 5027 | 4932 | 9,959 |
| 55 to 59 | 4614 | 4423 | 9,037 |
| 60 to 64 | 3796 | 3764 | 7,560 |
| 65 to 69 | 3002 | 2993 | 5,995 |
| 70 to 74 | 2085 | 2343 | 4,428 |
| 75 to 79 | 1325 | 1591 | 2,916 |
| 80 to 84 | 889 | 1120 | 2,009 |
| 85+ | 726 | 1426 | 2,152 |
Oswego 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 | 59064 | 59021 | 118,085 |
| WAC | 59067 | 58911 | 117,978 |
| WA | 58321 | 58152 | 116,473 |
| NHWAC | 57811 | 57698 | 115,509 |
| NHWA | 57140 | 57006 | 114,146 |
| H | 1434 | 1394 | 2,828 |
| HWAC | 1256 | 1213 | 2,469 |
| HWA | 1181 | 1146 | 2,327 |
| BAC | 1045 | 930 | 1,975 |
| NHBAC | 899 | 785 | 1,684 |
| TOM | 817 | 809 | 1,626 |
| NHTOM | 735 | 735 | 1,470 |
| AAC | 553 | 749 | 1,302 |
| BA | 709 | 578 | 1,287 |
| NHAAC | 524 | 725 | 1,249 |
| IAC | 623 | 607 | 1,230 |
| NHBA | 603 | 474 | 1,077 |
| NHIAC | 535 | 522 | 1,057 |
| AA | 341 | 555 | 896 |
| NHAA | 324 | 543 | 867 |
| IA | 295 | 303 | 598 |
| NHIA | 247 | 249 | 496 |
| HBAC | 146 | 145 | 291 |
| HBA | 106 | 104 | 210 |
| HIAC | 88 | 85 | 173 |
| HTOM | 82 | 74 | 156 |
| HIA | 48 | 54 | 102 |
| NAC | 41 | 48 | 89 |
| NHNAC | 40 | 39 | 79 |
| HAAC | 29 | 24 | 53 |
| NA | 15 | 18 | 33 |
| HAA | 17 | 12 | 29 |
| NHNA | 15 | 14 | 29 |
| HNAC | 1 | 9 | 10 |
| HNA | 0 | 4 | 4 |
• Onondaga County population
31.4 mi,
178°
• Oneida County
41.8 mi,
111°
• Jefferson County
37.8 mi,
11°
• Wayne County
42.8 mi,
269°
• Cayuga County
36.3 mi,
210°
• Madison County
47 mi,
144°
• Herkimer County
69 mi,
83°
• Cortland County
60.3 mi,
173°
• Seneca County
56.3 mi,
213°
• Lewis County
44.2 mi,
59°
[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 13 New York Notes
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