Illinois Congressional District 16

Voters

Registered Voters: 546,852
Active Voters: 513,232 (93.9%)

Party Registration

This state's voter file does not record party registration.

Turnout by Cycle

Cycle	General	Democratic Primary	Republican Primary
2025–2026	112,685 (20.6%)	1,083 (0.2%)	2,972 (0.5%)
2023–2024	390,565 (71.4%)	24,545 (4.5%)	66,991 (12.3%)
2021–2022	293,709 (53.7%)	25,873 (4.7%)	87,685 (16.0%)
2019–2020	353,838 (64.7%)	57,594 (10.5%)	53,250 (9.7%)
2017–2018	267,037 (48.8%)	39,303 (7.2%)	74,936 (13.7%)
2015–2016	290,276 (53.1%)	55,753 (10.2%)	118,769 (21.7%)
2013–2014	196,313 (35.9%)	10,450 (1.9%)	68,270 (12.5%)
2011–2012	233,419 (42.7%)	12,284 (2.2%)	69,213 (12.7%)

Turnout counts today's registered voters with a counted ballot in the cycle's elections (the odd and even year), as a share of today's registered voters. Voters who have since left the rolls are not counted.

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Source: Civitech voter file snapshot as of 12/15/2025. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".

Demographics

Total Citizen Population: 731,889
Citizen Voting Age Population (CVAP): 562,575

Citizen Population by Race/Ethnicity

Group	Citizens	Share
Non-Hispanic	683,459	93.4%
Hispanic	48,428	6.6%
White	635,610	86.8%
Black	17,837	2.4%
Asian	11,964	1.6%
American Indian / Alaska Native	391	0.1%
Native Hawaiian / Pacific Islander	113	0.0%
Two or More Races	1,452	0.2%

Citizen Voting Age Population by Race/Ethnicity

Group	CVAP	Share
Non-Hispanic	533,445	94.8%
Hispanic	29,123	5.2%
White	503,399	89.5%
Black	15,770	2.8%
Asian	9,133	1.6%
American Indian / Alaska Native	4,395	0.8%
Native Hawaiian / Pacific Islander	113	0.0%
Two or More Races	723	0.1%

Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation.