The Lazio regional election of 2018 took place in Lazio, Italy, on 4 March 2018, concurrently with the Italian general election and the Lombard regional election.

The 2018 Italian general election was held on 4 March 2018 after the Italian Parliament was dissolved by President Sergio Mattarella on 28 December 2017. Voters were electing the 630 members of the Chamber of Deputies and the 315 elective members of the Senate of the Republic for the 18th legislature of the Italian Republic since 1948. The election took place concurrently with the Lombard and Lazio regional elections. No party or coalition gained an absolute majority in the parliament, even though the centre-right coalition won a plurality of seats as a coalition, and the Five Star Movement (M5S) won a plurality of seats as an individual party.