2020 Maine Senate election

The 2020 Maine State Senate election was held on Tuesday, November 3, 2020, with the primary election using instant-runoff voting being held on July 14, 2020, to elect the 130th Maine Senate. Voters in all 35 districts of the Maine State Senate will elect their senators. The elections will coincide with the elections for other offices, including for U.S. President, U.S. Senate, U.S. House and the Maine House of Representatives. Republicans only needed to gain four seats to win control of the chamber; they instead gained only one and lost another two, resulting in a net increase in the Democratic Party's majority.

The primary elections were held on July 14, 2020.

Background
In the 2018 Maine State Senate elections, Democrats gained control of Maine State Senate by a 21–14 margin. Before those elections, Republicans had controlled the chamber since 2014 Maine State Senate elections.

Closest races
Seats where the margin of victory was under 10%:
 * 1) District 13, 2.96% gain
 * 2) District 34, 3.72% gain
 * 3) District 20, 6.84%
 * 4) District 11, 8.32%
 * 5) District 30, 9.6%

Detailed results
Source: Official candidate listings.