Ohio's 1st congressional district is represented by Democrat Greg Landsman. The district includes the city of Cincinnati, all of Warren County and borders the state of Kentucky. This district was once represented by President William Henry Harrison. After redistricting in 2010, the district was widely seen as heavily gerrymandered by state Republicans to protect the incumbent, Steve Chabot. Chabot lost the seat in 2022 to Landsman, after redistricting unified the city of Cincinnati into the district. The city was previously split between the 1st and 2nd districts. It is the wealthiest congressional district in Ohio, with 14.2 percent of households earning over $200,000, per a 2024 study.

The district is somewhat more Democratic than its predecessor even though it includes heavily Republican Warren County. Previous iterations of the district (before 2013) did not include Warren County. However, Hamilton County has double Warren County's population, creating a marginally Democratic seat.

Demographics According to the APM Research Lab's Voter Profile Tools (featuring the U.S. Census Bureau's 2019 American Community Survey), the district contained about 551,000 potential voters (citizens, age 18+). Of these, 74% are White and 21% are Black. Immigrants make up 4% of the district's potential voters. Median income among households (with one or more potential voter) in the district is about $64,000, while 11% of households live below the poverty line. 8% of those 25 and older have not earned a high school degree, while 34% hold a bachelor's or higher degree.

Composition For the 118th and successive Congresses (based on redistricting following the 2020 census), the district contains all or portions of the following counties, townships, and municipalities:

Hamilton County (27)

Amberley, Anderson Township, Arlington Heights, Blue Ash, Cincinnati, Columbia Township, Deer Park, Delhi Township, Elmwood Place, Evendale, Fairfax, Golf Manor, Loveland (part; also 2nd and 8th; shared with Clermont and Warren counties), Madeira, Mariemont, Milford (part; also 2nd; shared with Clermont County), Montgomery, Newtown, Norwood, Reading, Sharonville (part; also 8th), Silverton, St. Bernard, Symmes Township, Syracuse Township, Terrace Park, The Village of Indian Hill

Warren County (28)

All 28 townships and municipalities

Recent election results from statewide races

2023–2027 boundaries Year Office Results2008 PresidentObama 51% - 48%2012 PresidentRomney 50.01% - 49.99%2016 PresidentClinton 50% - 46% SenatePortman 57% - 39%2018 SenateBrown 56% - 44% GovernorCordray 50% - 47% Secretary of StateClyde 51% - 47% TreasurerRichardson Jr. 50.2% - 49.8% AuditorSpace 48% - 47% Attorney GeneralDettelbach 52% - 48%2020 PresidentBiden 53% - 45%2022 SenateRyan 54% - 46% GovernorDeWine 55% - 45% Secretary of StateLaRose 51% - 48% TreasurerSprague 52% - 48% AuditorFaber 51% - 49% Attorney GeneralYost 52% - 48%2024 PresidentHarris 53% - 46% SenateBrown 54% - 43%

2027–2033 boundaries Year Office Results2008 PresidentMcCain 50% - 49%2012 PresidentRomney 52% - 48%2016 PresidentTrump 49% - 46% SenatePortman 59% - 36%2018 SenateBrown 52% - 48% GovernorDeWine 50% - 47% Secretary of StateLaRose 50% - 48% TreasurerSprague 53% - 47% AuditorFaber 50% - 45% Attorney GeneralYost 51% - 49%2020 PresidentBiden 49.3% - 49.1%2022 SenateVance 50.1% - 49.9% GovernorDeWine 59% - 41% Secretary of StateLaRose 55% - 44% TreasurerSprague 56% - 44% AuditorFaber 55% - 45% Attorney GeneralYost 56% - 44%2024 PresidentTrump 51% - 48% SenateBrown 49% - 47% List of members representing the district

Member Party Years Congress Electoral history Counties represented District established March 4, 1813 John McLean Democratic-Republican March 4, 1813 –April 1816 Elected in 1812.Re-elected in 1814.Resigned to become Associate Judge of the Ohio Supreme Court. Vacant April 1816 –October 8, 1816 William Henry Harrison Democratic-Republican October 8, 1816 –March 3, 1819 Elected to finish McLean's term.Also elected the same day in 1816 to the next term.Retired. Thomas R. Ross Democratic-Republican March 4, 1819 –March 3, 1823 Elected in 1818.Re-elected in 1820.Redistricted to the . James W. Gazlay Democratic-Republican March 4, 1823 –March 3, 1825 Elected in 1822.Lost re-election. James Findlay Jacksonian March 4, 1825 –March 3, 1833 Elected in 1824.Re-elected in 1826.Re-elected in 1828.Re-elected in 1830. Robert Todd Lytle Jacksonian March 4, 1833 –March 10, 1834 Elected in 1832.Resigned. Vacant March 10, 1834 –December 27, 1834 Robert Todd Lytle Jacksonian December 27, 1834 –March 3, 1835 Re-elected in 1834 to finish the vacant term.Was not elected to the next term. Bellamy Storer Anti-Jacksonian March 4, 1835 –March 3, 1837 Elected in 1834. Alexander Duncan Democratic March 4, 1837 –March 3, 1841 Elected in 1836.Re-elected in 1838. Nathanael G. Pendleton Whig March 4, 1841 –March 3, 1843 Elected in 1840. Alexander Duncan Democratic March 4, 1843 –March 3, 1845 Elected in 1843. James J. Faran Democratic March 4, 1845 –March 3, 1849 Elected in 1844.Re-elected in 1846. David T. Disney Democratic March 4, 1849 –March 3, 1855 Elected in 1848.Re-elected in 1850.Re-elected in 1852. Timothy C. Day Opposition March 4, 1855 –March 3, 1857 Elected in 1854. George H. Pendleton Democratic March 4, 1857 –March 3, 1865 Elected in 1856.Re-elected in 1858.Re-elected in 1860.Re-elected in 1862. Benjamin Eggleston Republican March 4, 1865 –March 3, 1869 Elected in 1864.Re-elected in 1866.Lost re-election. Peter W. Strader Democratic March 4, 1869 –March 3, 1871 Elected in 1868. Aaron F. Perry Republican March 4, 1871 –1872 Elected in 1870.Resigned. Vacant 1872 –October 8, 1872 Ozro J. Dodds Democratic October 8, 1872 –March 3, 1873 Elected to finish Perry's term. Milton Sayler Democratic March 4, 1873 –March 3, 1879 Elected in 1872.Re-elected in 1874.Re-elected in 1876. Benjamin Butterworth Republican March 4, 1879 –March 3, 1883 Elected in 1878.Re-elected in 1880. John F. Follett Democratic March 4, 1883 –March 3, 1885 Elected in 1882. Benjamin Butterworth Republican March 4, 1885 –March 3, 1891 Elected in 1884.Re-elected in 1886.Re-elected in 1888. Bellamy Storer Republican March 4, 1891 –March 3, 1895 Elected in 1890.Re-elected in 1892. Charles Phelps Taft Republican March 4, 1895 –March 3, 1897 Elected in 1894. William B. Shattuc Republican March 4, 1897 –March 3, 1903 Elected in 1896.Re-elected in 1898.Re-elected in 1900. Nicholas Longworth Republican March 4, 1903 –March 3, 1913 Elected in 1902.Re-elected in 1904.Re-elected in 1906.Re-elected in 1908.Re-elected in 1910.Lost re-election. Stanley E. Bowdle Democratic March 4, 1913 –March 3, 1915 Elected in 1912.Lost re-election. Nicholas Longworth Republican March 4, 1915 – April 9, 1931 Elected in 1914.Re-elected in 1916.Re-elected in 1918.Re-elected in 1920.Re-elected in 1922.Re-elected in 1924.Re-elected in 1926.Re-elected in 1928.Re-elected in 1930.Died. Vacant April 9, 1931 –November 3, 1931 John B. Hollister Republican November 3, 1931 –January 3, 1937 Elected to finish Longworth's term.Re-elected in 1932.Re-elected in 1934.Lost re-election. Joseph A. Dixon Democratic January 3, 1937 –January 3, 1939 Elected in 1936.Lost re-election. Charles H. Elston Republican January 3, 1939 –January 3, 1953 Elected in 1938.Re-elected in 1940.Re-elected in 1942.Re-elected in 1944.Re-elected in 1946.Re-elected in 1948.Re-elected in 1950.Retired. Gordon H. Scherer Republican January 3, 1953 –January 3, 1963 Elected in 1952.Re-elected in 1954.Re-elected in 1956.Re-elected in 1958.Re-elected in 1960.Retired. Carl West Rich Republican January 3, 1963 –January 3, 1965 Elected in 1962.Lost re-election. John J. Gilligan Democratic January 3, 1965 –January 3, 1967 Elected in 1964.Lost re-election. Robert Taft Jr. Republican January 3, 1967 –January 3, 1971 Elected in 1966.Re-elected in 1968.Retired to run for U.S. Senator. William J. Keating Republican January 3, 1971 –January 3, 1974 Elected in 1970.Re-elected in 1972.Resigned. Vacant January 3, 1974 –March 5, 1974 Tom Luken Democratic March 5, 1974 –January 3, 1975 Elected to finish Keating's term.Lost re-election. Bill Gradison Republican January 3, 1975 –January 3, 1983 Elected in 1974.Re-elected in 1976.Re-elected in 1978.Re-elected in 1980.Redistricted to the . Tom Luken Democratic January 3, 1983 –January 3, 1991 Redistricted from the and re-elected in 1982.Re-elected in 1984.Re-elected in 1986.Re-elected in 1988.Retired. Charlie Luken Democratic January 3, 1991 –January 3, 1993 Elected in 1990.Retired. David S. Mann Democratic January 3, 1993 –January 3, 1995 Elected in 1992.Lost re-election. Steve Chabot Republican January 3, 1995 –January 3, 2009Elected in 1994.Re-elected in 1996.Re-elected in 1998.Re-elected in 2000.Re-elected in 2002.Re-elected in 2004.Re-elected in 2006.Lost re-election. 2003–2013 Steve Driehaus Democratic January 3, 2009 –January 3, 2011 Elected in 2008.Lost re-election. Steve Chabot Republican January 3, 2011 –January 3, 2023Elected again in 2010.Re-elected in 2012.Re-elected in 2014.Re-elected in 2016.Re-elected in 2018.Re-elected in 2020.Lost re-election.2013–2023 Greg Landsman Democratic January 3, 2023 –present Elected in 2022.Re-elected in 2024. 2023–2027

Recent election results