The map below shows the political leanings of people in and around Cook County. Darker red areas have almost entirely Republican voters, dark blue areas vote mostly for Democrats, and areas in lighter shades or in light purple are areas where the vote is usually split between parties.

Politics Key
Cook County tends to be very democratic based on voting results in recent elections. Compared to other nearby counties, Cook County has more democratic voters. Compared to the nation as a whole, Cook County leans more democratic.
Highly educated populations with bachelor’s degrees or higher tend to vote for more liberal candidates. In Cook County, 36.69% of all adults have earned a bachelor’s degree or higher. Educated women are far less likely to vote for conservatives, and in Cook County women make up 51.48% of the population.
Older Americans tend to vote more conservatively. Members of the Boomer and Silent generations (born 1928-1964) more often vote for republicans while GenX, Millennials (born 1965-1996) and younger generations consistently support democrats. The median age in Cook County is 37.9, which is younger than the national median age of 38.1.
Is Cook County a political battleground? Across all types of political contests in Cook County, including state, local and presidential elections, races come within five percentage points 2% of the time.
Note: Federal, local, and state elections are weighed based on the recency of the election and the importance most voters assign to each seat.
Nearby Counties
- DuPage County, IL: more conservative voters
- Will County, IL: more conservative voters
- Lake County, IN: more conservative voters
- Kane County, IL: more conservative voters
- Lake County, IL: more conservative voters
- Kendall County, IL: more conservative voters
- Porter County, IN: more conservative voters
- McHenry County, IL: more conservative voters
- Grundy County, IL: more conservative voters
- Kankakee County, IL: more conservative voters
Counties with Similar Populations
- Harris County, TX: more conservative voters
- Maricopa County, AZ: more conservative voters
- San Diego County, CA: more conservative voters
- Orange County, CA: more conservative voters
- Miami-Dade County, FL: more conservative voters
- Kings County, NY: more liberal voters
- Dallas County, TX: more conservative voters
- Riverside County, CA: more conservative voters
- Queens County, NY: more liberal voters
- San Bernardino County, CA: more conservative voters
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