2019 Italian by-elections

[1] The new Italian electoral law approved in 2017 and nicknamed Rosatellum, provides the election of members of Parliament in 232 single-member districts for the Chamber of Deputies and in 116 for the Senate of the Republic.

Four candidates filed papers for running: journalist Andrea Frailis for the Centre-left coalition, Daniela Noli for the Centre-right coalition, councillor and engineer Luca Caschili for the Five Star Movement, and volleyball coach Enrico Balletto for CasaPound.

Frailis, not affiliated to any party, competed with the support of the new "Progressives of Sardinia" coalition, formation created for the occasion, which unites both the Democratic Party and other formations, such as Free and Equal, that in Parliament formed the previous year two separate groups.

The two most populous municipalities registered the highest and lowest turnout: Cagliari with 17.17% and Quartu Sant'Elena with 12.46%.

Andrea Frailis, the candidate of the centre-left coalition, was elected deputy with 40.40% of the votes, while Daniele Caschili and Daniela Noli stopped respectively at 28.92% and 27.80%.