Satevicius won 52.39 percent of the vote in Sunday's mayoral election runoff against 45.88 percent for Jaroslav Narkevic of the Electoral Action of Poles in Lithuania – Christian Families Alliance, according to preliminary results from the Central Electoral Commission.
Voter turnout in Sunday's runoff stood at 35.05 percent, slightly up from 34.22 percent in the first round.
Satevicius, 30, has been working as director of Trakai's municipal administration since the start of this year. He had been a member of the municipal council since 2019.
The electoral watchdog is expected to announce the final results on October 28.
Trakai District elected its new mayor after Edita Rudeliene of the Liberal Movement became a member of parliament, replacing Kestutis Glaveckas who passed away in late April.
Independent candidate for Kelme
Ildefonsas Petkevicius, an independent candidate, won Sunday's mayoral election runoff in Lithuania's western district of Kelme, according to preliminary results from the Central Electoral Commission.
With votes from all polling districts counted, Petkevicius won 68.1 percent of the vote against 30.9 percent for Stasys Jokubauskas of the Lithuanian Social Democratic Party.
Petkevicius, 63, has been serving in the Council of Kelme District since Lithuania's independence from the Soviet Union.
Vaclovas Andrulis, Kelme's previous mayor, lost his mandate in June after he was convicted of bribery.