Home › Compare Cook County vs Harris County Side-by-side: the political memory, the demographic profile, and the deepest deltas between these two places.
Latest D+41.6 in 2024
Population 5,182,090 2024 ACS
County seat Chicago IL
Most similar Allendale County SC · twin score 100.0
2024 presidential margin D+41.6 MIT Election Lab
Population 5,182,090 2024 5-year
Median household income $83,498 2024 5-year
White (non-Hispanic) 40.1% 2024 5-year
Black 21.8% 2024 5-year
Hispanic / Latino 26.8% 2024 5-year
County seat Chicago
Peak Democratic margin D+53.4 in 2008 MIT Election Lab
Peak Republican margin R+49.0 in 1920 MIT Election Lab presidential history
Margin, 1892–2024 (partial returns from 1876) Presidential margin over time Democratic-minus-Republican presidential margin from 1892 to 2024. Most recent: +41.6% in 2024. flipped D · 1976 +41.6% D R 1892 2024 Presidential margin over time Year Margin (D minus R) 1892 +12.8% 1896 −18.4% 1900 −4.4% 1904 −32.1% 1908 −18.6% 1912 +13.0% 1916 −6.6% 1920 −49.0% 1924 −41.6% 1928 −6.2% 1932 +13.8% 1936 +27.5% 1940 +10.9% 1944 +15.9% 1948 +8.9% 1952 −0.7% 1956 −13.9% 1960 +13.0% 1964 +26.4% 1968 +9.5% 1972 −7.4% 1976 +8.7% 1980 +12.4% 1984 +2.6% 1988 +12.4% 1992 +30.0% 1996 +40.1% 2000 +40.0% 2004 +41.1% 2008 +53.4% 2012 +49.3% 2016 +53.1% 2020 +50.2% 2024 +41.6%
Latest D+5.5 in 2024
Population 4,838,303 2024 ACS
County seat Houston TX
Most similar Loudoun County VA · twin score 96.0
2024 presidential margin D+5.5 MIT Election Lab
Population 4,838,303 2024 5-year
Median household income $74,983 2024 5-year
White (non-Hispanic) 26.6% 2024 5-year
Black 18.6% 2024 5-year
Hispanic / Latino 44.0% 2024 5-year
County seat Houston
Peak Democratic margin D+75.7 in 1936 MIT Election Lab
Peak Republican margin R+25.6 in 1972 MIT Election Lab presidential history
Margin, 1892–2024 (partial returns from 1876) Presidential margin over time Democratic-minus-Republican presidential margin from 1908 to 2024. Most recent: +5.5% in 2024. flipped D · 2008 +5.5% D R 1908 2024 Presidential margin over time Year Margin (D minus R) 1908 +47.8% 1912 +62.2% 1916 +52.2% 1920 +24.5% 1924 +36.0% 1928 −11.6% 1932 +68.4% 1936 +75.7% 1940 +55.8% 1944 +56.9% 1948 +12.5% 1952 −15.3% 1956 −24.2% 1960 −6.1% 1964 +19.2% 1968 −4.1% 1972 −25.6% 1976 −5.2% 1980 −19.8% 1984 −23.1% 1988 −14.9% 1992 −4.9% 1996 −4.1% 2000 −11.4% 2004 −10.2% 2008 +1.6% 2012 +0.1% 2016 +12.3% 2020 +13.3% 2024 +5.5%
Top 9 deltas, ranked by absolute magnitude. Metric Cook County Harris County Population 5,182,090 4,838,303 Median household income $83,498 $74,983 Latest presidential margin D+41.6 D+5.5 Hispanic / Latino 26.8% 44.0% White (non-Hispanic) 40.1% 26.6% Median age 38.0 34.6 Black 21.8% 18.6% Poverty rate (overall) 13.5% 16.3% Asian 7.9% 7.3%