Throughout the history of the United States Congress, some members were elected either as representatives and/or senators from more than one U.S. state at different times in their career.

Multiple states in the House NameState (District)StartEndParty (at-large/5th districts)17891795Anti-Administration17951796Democratic-Republican (4th district)18011804 (5th district)17901791Pro-Administration (2nd district)18111815Democratic-Republican (16th/11th district)17931795Anti-Administration17951805Democratic-Republican (1st district)18111813 (5th district)1817181918211823 (2nd district)17951801Democratic-Republican (1st district)18231825 18251829Jacksonian (1st district)17971801Democratic-Republican (1st district)18031811 (15th district)18091811Federalist18171821 (2nd district)18211822 (at-large)18131817Federalist (1st district)1823182518251827National Republican (20th district)18181821Democratic-Republican (7th/5th districts)18211826 (19th district)18191821Democratic-Republican (6th/4th districts)18211825 (16th district)18191821Democratic-Republican (3rd district)18211823 (25th district)18331835Jacksonian (3rd district)18531855Democratic (15th district)18451849Democratic (10th district)18611863Union (2nd district)18631865 (10th/8th districts)18511859Democratic (2nd district)18751877 (12th/7th districts)18571865Democratic (6th/8th district)18691885 (9th district)18861889 (3rd/4th districts)18591865Republican (1st district)18681869 (2nd district)18591863Republican (6th district)18871891 (11th district)18611863Union (1st district)18631865 (12th district)18611863Union (2nd district)18631867Union (6th district)18951897Republican (14th district)19051907Democratic (25th district)19131915Democratic (5th district)19371937 (16th district)19631965Republican (2nd district)19691971

Multiple states in the Senate Only two senators have represented more than one state.

James Shields uniquely served terms in the U.S. Senate for three states; representing Illinois (1849–1855), Minnesota (1858–1859), and Missouri (1879). He was a Democrat. Waitman T. Willey was a Restored Government of Virginia Senator (1861–1863) who helped create West Virginia. He was then appointed as one of the new state's first two senators (1863–1871). He was a Unionist until 1865 and a Republican thereafter.

One state in the House, another in the Senate NameOfficesStartEndParty 17891792Democratic-Republican 17921805 17951801Federalist 18161816 17951801Democratic-Republican 18291831Jacksonian 17971801Democratic-Republican 18171817 17971809Democratic-Republican 18201825 18051809Democratic-Republican 18201829 18111816Democratic-Republican 18191844Democratic18481852 18111817Democratic-Republican 18261826Jacksonian 18131817Federalist 18271833National Republican18331841Whig18451850 18151818Democratic-Republican 18271828Jacksonian 18171820Democratic-Republican 1820182718291833National Republican 18231827Democratic-Republican 18461859Democratic 18291837Jacksonian 18451847Democratic 18391845Democratic 18521857 18411843Democratic 1850185518571861 18431847Whig 18631875Republican 18451847Whig 18491851 18601861Republican 18531855Democratic 18611866Republican 18591863Republican 1867186918701871 18811887 18971899Democratic 1913191919331939 19001901Democratic 19051907

Territories and states William Henry Harrison – the future president of the United States was a delegate to the 6th United States Congress from Northwest Territory (1799–1800), resigning to become territorial Governor of Indiana. He returned to Congress first as a representative from Ohio's 1st congressional district (1816–19), and then serving an incomplete term as senator for Ohio (1825–28), resigning to become U.S. Minister Plenipotentiary to Gran Colombia. He was a Whig. James M. Cavanaugh – represented Minnesota (1858–59) as a representative and then Montana Territory (1867–71) as a delegate. He was a Democrat. Stephen Benton Elkins – represented New Mexico Territory (1873–77) as a delegate and later West Virginia (1895–1911) as a senator. He was a Republican. John Noble Goodwin – represented Maine as a representative (1861–63) and later Arizona Territory as a delegate (1866–76). He was also first governor of the Territory of Arizona. He was a Republican. George Wallace Jones – was a delegate from Michigan Territory (1835–37) until Michigan was created as a State. He continued representing the remaining renamed Wisconsin Territory as a delegate (1837–39). Later, after Iowa was carved from the Wisconsin Territory and subsequently admitted to the union, he became one of the first senators from Iowa (1848–59). He was a Democrat. Richard Cunningham McCormick – represented Arizona Territory (1869–75) and later New York as a representative (1895–97). He was a Unionist as a delegate and a Republican as a representative. Henry Hastings Sibley – represented Wisconsin Territory (1848–49) and later Minnesota Territory as a delegate (1849–53). He was a Democrat. Jesse B. Thomas – represented Indiana Territory (1808–09) as a delegate and later Illinois (1818–1829) as a senator. He was initially a Democratic-Republican, but became an Anti-Jacksonian while senator. William H. Wallace – represented Washington Territory (1861–63) and later Idaho Territory as a delegate (1864–65). He was a Republican.

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