Sangamon County IL Information


Sangamon County Subdivisions

Sangamon County IL Data & Demographics (As of July 1, 2017)


Total Population 199,816
Daytime Population: Workers 119,233
Daytime Population: Residents 95,965
Total Daytime Population (TDP) 215,198
Ratio TDP/Total Population1 1.08
Population in Households 195,904
Population in Familes 151,512
Population in Group Qrtrs 3,912
Population Density2 230
Diversity Index3 35


Median Household Income $55,187
Average Household Income $75,443
Per Capita Income $32,307


Total Housing Units 91,888 (100%)
Owner Occupied HU 56,946 (62.0%)
Renter Occupied HU 27,220 (29.6%)
Vacant Housing Units 7,722 ( 8.4%)
Median Home Value $123,351
Average Home Value $154,701


Total Households 84,166
Average Household Size 2.33
Family Households 51,398
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.16% 0.16%
Households 0.19% 0.18%
Families 0.01% 0.06%
Median Household Income   1.04%
Per Capita Income   2.11%


Sangamon County IL - Peer Comparisons by Rank and Percentile

The table below compares Sangamon County to the other 102 counties and county equivalents in Illinois by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 11 90th
Population Density # 13 88th
Diversity Index # 27 75th
Median Household Income # 21 80th
Per Capita Income # 11 90th

Additional comparisons and rankings can be made with a VERY EASY TO USE Illinois Census Data Comparison Tool.