Map of upper house elections: Democrats gained control Democrats retained control Republicans gained control Republicans retained control Coalition retained control Non-partisan legislature No regularly-scheduled elections
Map of lower house elections: Democrats gained control Democrats retained control Republicans gained control Republicans retained control Non-partisan legislature No regularly-scheduled elections
TheNew Hampshire Senate saw the election of the first-ever female majority. This is the first time this has occurred in any chamber of anystate legislature in United States history.[2] In New York, the Democrats obtained a trifecta for the first time since 1935, and in Delaware for the first time since 1977.[3]
The Democrats took control of six legislative bodies to the Republicans' four. Democrats took control of theDelaware House of Representatives, for the first time since 1985, theMontana House of Representatives, theNevada Senate, and the New York State Senate, for the first time since 1966, theOhio House of Representatives, and theWisconsin State Assembly. Republicans took control of theMontana Senate; both houses of theTennessee General Assembly,[4] for the first time since 1870; and theOklahoma Senate, for the first time in state history. With the Montana Senate and the Montana House of Representatives flipping, this election cycle marked the last time in U.S. history as of 2026 where the upper house and lower house, held by different political parties in a state legislature, both flipped in the same cycle.
Regularly scheduled elections were held in 85 of the 99 state legislative chambers in the United States. Nationwide, regularly scheduled elections were held for 5,948 of the 7,383 legislative seats. Many legislative chambers held elections for all seats, but some legislative chambers that use staggered elections held elections for only a portion of the total seats in the chamber.[5] The chambers not up for election either hold regularly scheduled elections in odd-numbered years, or have four-year terms and hold all regularly scheduled elections inpresidential midterm election years.
Note that this table only covers regularly scheduled elections; additional special elections took place concurrently with these regularly scheduled elections.
Partisan control of state governments after the 2008 elections:
Democrats maintained trifecta
Democrats gained trifecta
Republicans maintained trifecta
Divided government maintained
Divided government established
Officially non-partisan legislature
Upper house seats by party holding majority in each state
Democratic
50–60%
60–70%
70–80%
80–90%
90–100%
Republican
50–60%
60–70%
70–80%
80–90%
Tie
50%
Lower house seats by party holding majority in each state
Democratic
50–60%
60–70%
70–80%
80–90%
90–100%
Republican
50–60%
60–70%
70–80%
Tie
50%
Net changes to upper house seats after the 2008 elections +1 Dem seat +2 Dem seats +3 Dem seats +1 Rep seat +2 Rep seats +3 Rep seats +1 Ind seat
Net changes to lower house seats after the 2008 elections +1 Dem seat +2 Dem seats +3–5 Dem seats +6–9 Dem seats +1 Rep seat +2 Rep seats +4 Rep seats +15 Rep seats +1 Ind seat +1 Green seat
All of the seats of theAlaska House of Representatives and half of theAlaska Senate were up for election. The Democratic-led coalition maintained control of the Senate while Republicans maintained control of the House.
All of the seats of theIndiana House of Representatives and half of theIndiana Senate were up for election. Republicans maintained control of the Senate while Democrats maintained control of the House of Representatives.
All of the seats of theIowa House of Representatives and half of theIowa Senate were up for election. Democrats maintained control of both state legislative chambers.
All of the seats of theKentucky House of Representatives and half of theKentucky Senate were up for election. Republicans maintained control of the Senate and Democrats maintained control of the House of Representatives.
All of the seats of theMontana House of Representatives and half of theMontana Senate were up for election. Republicans flipped control of the Senate and Democrats flipped control of the House.
Nebraska is the only U.S. state with aunicameral legislature; half of the seats of theNebraska Legislature were up for election. Nebraska is also unique in that its legislature is officially non-partisan and holds non-partisan elections, although the Democratic and Republican parties each endorse legislative candidates. Republicans maintained control.
All of the seats of theNevada House of Representatives and half of theNevada Senate were up for election. Democrats maintained control of the House and won control of the Senate.
All of the seats of theOhio House of Representatives and half of theOhio Senate were up for election. Democrats won control of the House of Representatives while Republicans maintained control of the Senate.
All of the seats of thePennsylvania House of Representatives and half of thePennsylvania Senate were up for election. Republicans maintained control of the Senate while Democrats maintained control of the House of Representatives.
All of the seats of theTexas House of Representatives and half of theTexas Senate were up for election. Republicans maintained control of both state legislative chambers.
All of the seats of theUtah House of Representatives and half of theUtah Senate were up for election. Republicans maintained control of both state legislative chambers.
All of the seats of theWisconsin Assembly and half of theWisconsin Senate were up for election. Democrats maintained control of the Senate and won control of the Assembly.
All of the seats of theAmerican Samoa Senate and theAmerican Samoa House of Representatives were up for election. Members of the Senate serve four-year terms, while members of the House of Representatives serve two-year terms. Gubernatorial and legislative elections are conducted on a nonpartisan basis in American Samoa.
All of the seats of the unicameralLegislature of Guam were up for election. All members of the legislature serve a two-year term. Democrats retained control of the legislature.
All of the seats of the unicameralLegislature of the Virgin Islands were up for election. All members of the legislature serve a two-year term. Democrats retained control of the legislature.
^Following the defection of SenatorMicheal R. Williams from the Republican party, no party controlled theTennessee Senate. Thus the chamber is not included in the total here.
^abTheAlaska Senate was controlled by a coalition of Democrats and Republicans. The minority caucus consists of Republicans who were not part of the majority coalition.
^abcdefghThe upper houses of Arkansas, Delaware, Florida, Hawaii, Illinois, Minnesota, New Jersey, and Texas use a 2-4-4 term length system.
^abcThese figures represent the seats of Nebraska's unicameral legislature.