Mercer County, Illinois demographics
Population: 15,779
Median age: 44.6
Median household income: 59,972
Demographics, population, home values, social and economic characteristics of Mercer County, Illinois.
Population
| 2021 | 15,779 |
| 2020 | 15,503 |
| 2019 | 15,589 |
| 2018 | 15,693 |
| 2017 | 15,794 |
| 2016 | 15,971 |
| 2015 | 16,107 |
| 2014 | 16,204 |
| 2013 | 16,325 |
| 2012 | 16,421 |
| 2011 | 16,497 |
| 2010 | 16,551 |
| 2009 | 16,440 |
Mercer County, IL cities
Aledo city - 3,860
Alexis village - 735
Joy village - 367
Keithsburg city - 652
Matherville village - 876
New Boston city - 608
North Henderson village - 207
Reynolds village - 673
Seaton village - 257
Sherrard village - 690
Viola village - 1,141
Windsor village - 803
Census data for Mercer County, Illinois
Demographic and housing estimates in Mercer County, Illinois
| Total population | 15,779 |
| Male | 7,972 |
| Female | 7,807 |
| Total population | 15,779 |
| Under 5 years | 817 |
| 5 to 9 years | 831 |
| 10 to 14 years | 1,065 |
| 15 to 19 years | 1,034 |
| 20 to 24 years | 772 |
| 25 to 34 years | 1,586 |
| 35 to 44 years | 1,881 |
| 45 to 54 years | 2,040 |
| 55 to 59 years | 1,265 |
| 60 to 64 years | 1,124 |
| 65 to 74 years | 1,892 |
| 75 to 84 years | 1,024 |
| 85 years and over | 448 |
| Median age (years) | 44.6 |
| Under 18 years | 3,381 |
| 16 years and over | 12,761 |
| 18 years and over | 12,398 |
| 21 years and over | 11,822 |
| 62 years and over | 4,016 |
| 65 years and over | 3,364 |
| Total population | 15,779 |
| One race | 15,337 |
| White | 15,082 |
| Black or African American | 79 |
| American Indian and Alaska Native | 0 |
| Asian | 52 |
| Native Hawaiian and Other Pacific Islander | 0 |
| Some other race | 124 |
| Two or more races | 442 |
| Citizen, VOTING AGE 18 and over population | 12,335 |
| Male Citizen, VOTING AGE 18 and over population | 6,211 |
| Female Citizen, VOTING AGE 18 and over population | 6,124 |
Social characteristics in Mercer County, Illinois
| Total households | 6,339 |
| Family households (families) | 3,696 |
| Married-couple family | 296 |
| Male householder, no wife present, family | 1,074 |
| Female householder, no husband present, family | 879 |
| Nonfamily households | 1,273 |
| Average household size | 2,213 |
| Average family size | 2.46 |
Economic characteristics in Mercer County, Illinois
| Total households | 6,339 |
| Less than $10,000 | 350 |
| $10,000 to $14,999 | 230 |
| $15,000 to $24,999 | 566 |
| $25,000 to $34,999 | 543 |
| $35,000 to $49,999 | 884 |
| $50,000 to $74,999 | 1,215 |
| $75,000 to $99,999 | 879 |
| $100,000 to $149,999 | 1,127 |
| $150,000 to $199,999 | 379 |
| $200,000 or more | 166 |
| Median household income (dollars) | 59,972 |
Housing characteristics in Mercer County, Illinois
| Total housing units | 7,299 |
| Occupied housing units | 6,339 |
| Vacant housing units | 960 |
| Total housing units | 7,299 |
| 1-unit, detached | 6,309 |
| 1-unit, attached | 70 |
| 2 units | 99 |
| 3 or 4 units | 211 |
| 5 to 9 units | 140 |
| 10 to 19 units | 45 |
| 20 or more units | 166 |
| Mobile home | 257 |
| Boat, RV, van, etc. | 2 |
| Total housing units | 7,299 |
| Built 2014 or later | 0 |
| Built 2010 to 2013 | 191 |
| Built 2000 to 2009 | 475 |
| Built 1990 to 1999 | 591 |
| Built 1980 to 1989 | 321 |
| Built 1970 to 1979 | 1,283 |
| Built 1960 to 1969 | 603 |
| Built 1950 to 1959 | 788 |
| Built 1940 to 1949 | 504 |
| Built 1939 or earlier | 2,543 |
| Total housing units | 7,299 |
| 1 room | 243 |
| 2 rooms | 112 |
| 3 rooms | 182 |
| 4 rooms | 643 |
| 5 rooms | 1,456 |
| 6 rooms | 1,428 |
| 7 rooms | 1,183 |
| 8 rooms | 973 |
| 9 rooms or more | 1,079 |
| Median rooms | 6.2 |
| Total housing units | 7,299 |
| No bedroom | 257 |
| 1 bedroom | 406 |
| 2 bedrooms | 1,897 |
| 3 bedrooms | 3,306 |
| 4 bedrooms | 1,157 |
| 5 or more bedrooms | 276 |
| Occupied housing units | 6,339 |
| Owner-occupied | 4,959 |
| Renter-occupied | 1,380 |
| Average household size of owner-occupied unit | 2.54 |
| Average household size of renter-occupied unit | 2.16 |
| Occupied housing units | 6,339 |
| Moved in 2017 or later | 274 |
| Moved in 2015 to 2016 | 1,384 |
| Moved in 2010 to 2014 | 984 |
| Moved in 2000 to 2009 | 1,354 |
| Moved in 1990 to 1999 | 1,087 |
| Moved in 1989 and earlier | 1,256 |
| Owner-occupied units | 4,959 |
| Less than $50,000 | 488 |
| $50,000 to $99,999 | 1,496 |
| $100,000 to $149,999 | 1,163 |
| $150,000 to $199,999 | 816 |
| $200,000 to $299,999 | 729 |
| $300,000 to $499,999 | 180 |
| $500,000 to $999,999 | 86 |
| $1,000,000 or more | 1 |
| Median (dollars) | 116,300 |
| Owner-occupied units | 4,959 |
| Housing units with a mortgage | 2,893 |
| Housing units without a mortgage | 2,066 |
| Occupied units paying rent | 1,230 |
| Less than $500 | 244 |
| $500 to $999 | 822 |
| $1,000 to $1,499 | 103 |
| $1,500 to $1,999 | 54 |
| $2,000 to $2,499 | 0 |
| $2,500 to $2,999 | 0 |
| $3,000 or more | 7 |
| Median (dollars) | 692 |
| No rent paid | 150 |
Demographic data for Mercer County, IL and each city in the county. Lists of cities by population, wealth and poverty in Mercer County, IL.
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