Home › Compare Miami-Dade County vs Harris County Side-by-side: the political memory, the demographic profile, and the deepest deltas between these two places.
Latest R+11.4 in 2024
Population 2,738,356 2024 ACS
Most similar Imperial County CA · twin score 94.0
2024 presidential margin R+11.4 MIT Election Lab
Population 2,738,356 2024 5-year
Median household income $71,753 2024 5-year
White (non-Hispanic) 12.6% 2024 5-year
Black 14.1% 2024 5-year
Hispanic / Latino 69.3% 2024 5-year
Peak Democratic margin D+95.6 in 1892 MIT Election Lab
Peak Republican margin R+21.7 in 1928 MIT Election Lab presidential history
Margin, 1892–2024 (partial returns from 1876) Presidential margin over time Democratic-minus-Republican presidential margin from 1884 to 2024. Most recent: −11.4% in 2024. flipped R · 2024 −11.4% D R 1884 2024 Presidential margin over time Year Margin (D minus R) 1884 +19.4% 1888 No data 1892 +95.6% 1896 +0.5% 1900 +30.5% 1904 +45.5% 1908 +43.3% 1912 +60.2% 1916 +35.8% 1920 +15.0% 1924 +6.8% 1928 −21.7% 1932 +31.7% 1936 +46.2% 1940 +34.6% 1944 +32.9% 1948 +16.5% 1952 −13.5% 1956 −10.7% 1960 +15.3% 1964 +28.0% 1968 +11.4% 1972 −18.1% 1976 +17.6% 1980 −10.5% 1984 −18.3% 1988 −11.0% 1992 +3.5% 1996 +19.5% 2000 +6.3% 2004 +6.3% 2008 +16.1% 2012 +23.7% 2016 +29.6% 2020 +7.4% 2024 −11.4%
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 Miami-Dade County Harris County Population 2,738,356 4,838,303 Median household income $71,753 $74,983 Hispanic / Latino 69.3% 44.0% Latest presidential margin R+11.4 D+5.5 White (non-Hispanic) 12.6% 26.6% Median age 40.7 34.6 Asian 1.5% 7.3% Black 14.1% 18.6% Poverty rate (overall) 14.7% 16.3%
