Petras Simonas Gedgaudas was a Lithuanian noble and diplomat. He briefly was a regent of Polotsk in 1440, regent of Smolensk in 1447–1451, and castellan of Vilnius in 1451.
- Position held
- Castellan of Vilnius, Q123760093, starosta of Polotsk, Court Marshal
- Citizenship
- Grand Duchy of Lithuania
- Died
- April 1451