One by-election was held in Italy in 2023. The election was held at the same time as the 2023 Trentino-Alto Adige/Südtirol provincial elections and Foggia's local elections.

List Senate Lombardy 06: Monza A by-election was held in the constituency of Monza on 22 and 23 October 2023 to replace senator and former prime minister Silvio Berlusconi (Forza Italia), who died of leukemia on 12 June 2023. Forza Italia member Adriano Galliani won the election with 51.46% of the votes. His main opponent in the election, right-to-die activist Marco Cappato, conceded defeat.

2023 Monza by-election Party or coalition Candidate Votes % +/− Centre-right Adriano Galliani (FI) 67,801 51.46 +1.20 With Cappato Marco Cappato (Eumans) 52,079 39.53 -5.55 South With North Cateno De Luca (ScN) 2,313 1.76 New People's Union Giovanna Capelli (UP) 2,278 1.73 +0.77 Italian Communist Party Domenico Di Modugno (PCI) 2,172 1.65 New Sovereign Popular Democracy Daniele Giovanardi (DSP) 1,884 1.43 +0.45 Force of the People Lillo Musso (FdP) 1,661 1.26 New Democracy and Subsidiarity Andrea Brenna (DeS) 1,566 1.19 New Total votes 131,754 100.00 0.00 Turnout135,163 19.25 -51.80 Centre-right hold

See also By-elections in Italy

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