• county
  • FIPS 17167
  • Largest town: Springfield

Sangamon County, Illinois

Sangamon County had 194,345 residents in the Census Vintage 2024 estimate, on 868.2 square miles of land. It ranks 11th of 102 in Illinois by population and 9th by land area.

Population
194,345
#11 of 102 in Illinois · #366 in US
Area
868.2 sq mi
#9 of 102 in Illinois · #944 in US
Density
224 / sq mi
#13 of 102 in Illinois · #530 in US
Median household income
$73,004
#27 of 102 in Illinois · #794 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Sangamon County within Illinois. Pin: Springfield.

Measure from here

Tools and pages that start from Sangamon County

Sangamon County population, land area and income

Sangamon County had 194,345 residents in the Census Vintage 2024 estimate, on 868.2 square miles of land. It ranks 11th of 102 in Illinois by population and 9th by land area. That works out to 223.8 people per square mile, 2.3 times the US average of 96.3, and in the top quarter nationally.

The median county-equivalent in Illinois has 24,447 residents, so Sangamon County is 7.9 times that size.

Its SAIPE 2023 median household income of $73,004 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

194,345

3144th1st

366th of 3,144 (US)

Land area

868 sq mi

3144th1st

944th of 3,144 (US)

Density

223.8 / sq mi

3144th1st

530th of 3,144 (US)

Median household income

$73,004

3143rd1st

794th of 3,143 (US)

Rank within Illinois (102)

Population

194,345

102nd1st

11th of 102 (IL)

Land area

868 sq mi

102nd1st

9th of 102 (IL)

Density

223.8 / sq mi

102nd1st

13th of 102 (IL)

Median household income

$73,004

102nd1st

27th of 102 (IL)

How Sangamon County's population changed since 2020

Sangamon County lost 1,878 residents between the July 2020 and July 2024 estimates, a drop of 1.0%. That ranks 31st of 102 in Illinois for growth. The median Illinois county changed by -1.7%, and the state as a whole by -0.7%.

Since the April 2020 estimates base, Sangamon County recorded 8,596 births and 9,229 deaths, a natural change of -633. Net international migration added +2,051 and net domestic migration, people moving to or from other US counties, came to -3,557. The largest single component was domestic migration, which removed 3,557 people.

196.2k2020195.5k2021194.5k2022194.2k2023194.3k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
8,596
Deaths
9,229
Net international migration
+2,051
Net domestic migration
-3,557
Change, July 2023 to July 2024
+129

Where Sangamon County is

The Census internal point of Sangamon County is at 39.756900, -89.662400. It sits in UTM zone 16N. The map shades Illinois's 102 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Sangamon County outlined. Dots are towns of 1,000+ people with residents in it.

Piatt County: -0.3%Hamilton County: -2.2%Williamson County: -0.1%Edgar County: -2.4%Macoupin County: -2.3%Marshall County: -1.3%Putnam County: +0.0%Richland County: -2.8%Washington County: -1.4%Lee County: -1.5%Douglas County: +0.2%Cook County: -1.6%Effingham County: -0.3%Edwards County: -3.6%Cass County: -2.0%Clay County: -3.4%Knox County: -2.2%LaSalle County: -0.9%Cumberland County: -1.3%Warren County: -3.7%Moultrie County: -0.9%Menard County: -2.5%Fayette County: -1.5%Boone County: -0.0%Lawrence County: -3.2%Marion County: -3.2%Champaign County: +3.0%Clark County: -2.4%Ford County: -0.4%Wayne County: -1.4%Logan County: -1.4%Grundy County: +2.5%Jasper County: -1.8%Crawford County: -1.3%McDonough County: -1.7%Clinton County: +0.5%Perry County: -3.0%Montgomery County: -2.2%Henry County: -2.0%Livingston County: -1.2%Scott County: -3.8%Alexander County: -11.2%Bureau County: -2.2%Brown County: +1.1%Mason County: -3.9%Calhoun County: -4.1%Greene County: -4.3%Coles County: -1.4%Kendall County: +8.2%Lake County: +0.7%Mercer County: -2.2%St. Clair County: -2.3%Wabash County: -3.0%Bond County: -1.7%DuPage County: +0.6%Gallatin County: -5.2%Stephenson County: -3.3%McHenry County: +1.9%White County: -3.0%Saline County: -3.9%Christian County: -2.2%Sangamon County: -1.0%Massac County: -3.6%Macon County: -2.9%Johnson County: -0.0%Jo Daviess County: -2.6%Peoria County: -1.0%DeKalb County: +1.0%Pope County: -1.5%De Witt County: -0.9%Schuyler County: -1.7%Fulton County: -3.1%Ogle County: -0.8%Jersey County: -1.6%Iroquois County: -3.3%Kankakee County: -0.9%Rock Island County: -1.1%Pulaski County: -5.8%Kane County: +0.9%Union County: -2.4%Whiteside County: -1.7%Woodford County: -0.3%Carroll County: -1.5%Adams County: -2.3%Hardin County: -2.6%Madison County: -1.0%Hancock County: -3.1%Monroe County: +0.0%Tazewell County: -1.1%Jackson County: -0.1%Vermilion County: -3.9%Randolph County: -0.6%McLean County: +0.5%Morgan County: -2.6%Shelby County: -1.7%Will County: +1.7%Winnebago County: -0.4%Jefferson County: -2.4%Stark County: -2.2%Henderson County: -4.5%Pike County: -2.6%Franklin County: -1.8%
Change 2020 to 2024
  1. < -3.0%
  2. < -2.2%
  3. < -1.4%
  4. < -0.3%
  5. ≥ -0.3%
no data

Orange pin: Sangamon County internal point. Dark pin: Springfield.

Internal point

Decimal
39.756900, -89.662400
DMS
39°45'24.84"N 89°39'44.64"W
UTM
16N 271919.4E 4404166.4N
Geohash
dp04pttbd
Plus code
86FGQ84Q+Q2

Towns in Sangamon County

15 incorporated places of 1,000+ people have residents in Sangamon County, 156,957 people together, or 81% of the county. Each figure counts only the part of the town inside Sangamon County; towns marked "part" extend into another county. The largest is Springfield with 112,949.

  1. 01Springfield112,949
  2. 02Chatham14,639
  3. 03Sherman4,634
  4. 04Auburn4,453
  5. 05Rochester4,044
  6. 06Riverton3,489
  7. 07Pawnee2,698
  8. 08Jerome1,646
  9. 09Southern View1,551
  10. 10Williamsville1,441
  11. 11Leland Grove1,409
  12. 12Grandview1,387
  13. 13New Berlin1,359
  14. 14Divernon1,116
  15. 15Virden (part)142
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Sangamon County

The Census 2024 county adjacency file lists 8 neighbors for Sangamon County. The most populous is Macon County, IL, with 100,737 residents. Distances run between Census internal points in a straight line.

Distance to Springfield and the nearest big city

Springfield is 1.8 miles NNE of Sangamon County's internal point in a straight line. The nearest place of 100,000 or more is Springfield, IL (population 112,949), 2.5 miles away.

Sangamon County FIPS code

The FIPS code of Sangamon County is 17167: state code 17 for Illinois plus county code 167. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $73,004.

Questions people ask

What is the population of Sangamon County, Illinois?

The Census Vintage 2024 estimate for July 1, 2024 is 194,345. That is down 1,878 people (1.0%) from the July 2020 estimate of 196,223.

What is the FIPS code of Sangamon County?

17167. The first two digits (17) are Illinois; the last three (167) identify the county.

What is the largest town in Sangamon County?

Springfield, with 112,949 residents inside Sangamon County in 2024.

Which counties border Sangamon County?

8 county-equivalents border it in the Census 2024 adjacency file: Macon County, IL; Macoupin County, IL; Christian County, IL; Morgan County, IL; Montgomery County, IL; Logan County, IL; Cass County, IL; Menard County, IL.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.