Map of upper house elections: Democrats gained control Democrats retained control Republicans gained control Republicans retained control Coalition gained control Coalition retained control Split body formed Non-partisan legislature No regularly-scheduled elections
Map of lower house elections: Democrats gained control Democrats retained control Republicans gained control Republicans retained control Coalition gained control Non-partisan legislature No regularly-scheduled elections
Regularly scheduled elections were held in 86 of the 99 state legislative chambers in the United States. Nationwide, regularly scheduled elections were held for 5,876 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.[3] 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 in presidential midterm election years.
Note that this table only covers regularly scheduled elections; additional special elections took place concurrently with these regularly scheduled elections.
News sources predicted Democrats to make mild gains in state legislative control, owing to the historic lows they hit after the 2014 elections and higher predicted turnout among Democratic voters during the concurrent presidential election.[4][5]
Ratings are designated as follows:
"Tossup": Competitive, no advantage
"Lean": Competitive, slight advantage
"Likely": Not competitive, but opposition could make significant gains
Upper house seats by party holding majority in each state
Republican
50–60%
60–70%
70–80%
80–90%
90–100%
Democratic
50–60%
60–70%
70–80%
80–90%
90–100%
Tie
50%
Lower house seats by party holding majority in each state
Republican
50–60%
60–70%
70–80%
80–90%
Democratic
50–60%
60–70%
70–80%
80–90%
Net changes to upper house seats after the 2016 elections +1 Dem seat +2 Dem seats +3 Dem seats +1 Rep seat +2 Rep seats +3–4 Rep seats +6 Rep seats
Net changes to lower house seats after the 2016 elections +1 Dem seat +2 Dem seats +3–5 Dem seats +10–16 Dem seats +1 Rep seat +2 Rep seats +3–5 Rep seats +6–17 Rep seats +1 Ind seat +1 Prog seat
Half of the seats of the Alaska Senate and all of the seats of the Alaska House of Representatives were up for election in 2016. The Alaska legislature was controlled by Republicans. Republicans maintained control of the Senate, while the Alaska House of Representatives flipped to a Democratic-led coalition of Democrats, Republicans, and independents.[6]
Half of the seats of the Arkansas Senate and all of the seats of the Arkansas House of Representatives were up for election in 2016. Republicans held control of both chambers, maintaining a government trifecta.
Half of the seats of the California State Senate and all of the seats of the California State Assembly were up for election in 2016. Democrats held control of both chambers, maintaining a government trifecta.
Half of the seats of the Colorado Senate and all of the seats of the Colorado House of Representatives were up for election in 2016. Democrats held control of the state House and Republicans maintained control of the state Senate.
Half of the seats of the Delaware Senate and all of the seats of the Delaware House of Representatives were up for election in 2016. Democrats held control of both chambers, maintaining a government trifecta.
Half of the seats of the Florida Senate and all of the seats of the Florida House of Representatives were up for election in 2016. Republicans held control of both chambers, maintaining a government trifecta.
Half of the seats of the Hawaii Senate and all of the seats of the Hawaii House of Representatives were up for election in 2016. Democrats held control of both chambers, maintaining a government trifecta.
All of the seats of the Idaho Senate and the Idaho House of Representatives were up for election in 2016. Republicans held control of both chambers, maintaining a government trifecta.
Half of the seats of the Indiana Senate and all of the seats of the Indiana House of Representatives were up for election in 2016. Republicans held control of both chambers, maintaining a government trifecta.
Half of the seats of the Iowa Senate and all of the seats of the Iowa House of Representatives were up for election in 2016. Republicans held control of the state House, and won the state Senate thereby establishing a government trifecta.
Half of the seats of the Kentucky Senate and all of the seats of the Kentucky House of Representatives were up for election in 2016. Republicans held control of the state Senate, and won control of the state House for the first time since 1922, thus establishing a Republican trifecta.
All of the seats of the Maine Senate and the Maine House of Representatives were up for election in 2016. Democrats held control of the state House, and Republicans maintained control of the state Senate.
All of the seats of the Michigan House of Representatives were up for election in 2016. The Michigan Senate did not hold regularly scheduled elections in 2016. Republicans maintained control of the chamber.
All of the seats of the Minnesota Senate and the Minnesota House of Representatives were up for election in 2016. Republicans won control of the State Senate, while maintaining control of the state House.
Nebraska is the only U.S. state with a unicameral legislature; half of the seats of the Nebraska Legislature were up for election in 2016. 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.
Half of the seats of the Nevada Senate and all of the seats of the Nevada Assembly were up for election in 2016. Democrats won control of both chambers, ending a government trifecta.
Half of the seats of the Ohio Senate and all of the seats of the Ohio House of Representatives were up for election in 2016. Republicans retained control of both chambers, maintaining a government trifecta.
Half of the seats of the Oklahoma Senate and all of the seats of the Oklahoma House of Representatives were up for election in 2016. Republicans retained control of both chambers, maintaining a government trifecta.
Half of the seats of the Oregon State Senate and all of the seats of the Oregon House of Representatives were up for election in 2016. Democrats retained control of both chambers, maintaining a government trifecta.
Half of the seats of the Tennessee Senate and all of the seats of the Tennessee House of Representatives were up for election in 2016. Republicans retained control of both chambers, maintaining a government trifecta.
Half of the seats of the Texas Senate and all of the seats of the Texas House of Representatives were up for election in 2016. Republicans retained control of both chambers, maintaining a government trifecta.
Half of the seats of the Utah State Senate and all of the seats of the Utah House of Representatives were up for election in 2016. Republicans retained control of both chambers, maintaining a government trifecta.
Half of the seats of the Wisconsin Senate and all of the seats of the Wisconsin State Assembly were up for election in 2016. Republicans retained control of both chambers.
Half of the seats of the Wyoming Senate and all of the seats of the Wyoming House of Representatives were up for election in 2016. Republicans retained control of both chambers, maintaining a government trifecta.
All of the seats of the American Samoa Senate and the American 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 unicameral Legislature of Guam were up for election. All members of the legislature serve a two-year term. Democrats retained control of the legislature.
A portion of the seats of the Northern Mariana Islands Senate, and all of the seats of the Northern Mariana Islands House of Representatives, were up for election. Members of the senate serve either four-year terms, while members of the house serve two-year terms. Republicans maintained control of the upper house, and won control of the lower house from Independents.
All of the seats of the unicameral Legislature of the Virgin Islands were up for election. All members of the legislature serve a two-year term. Democrats retained control of the legislature.