Balloting was held in 23 major cities Sunday and Monday, and those aligned with Prodi's government won 14 contests outright. The center-right took four elections and runoffs were set in five others in two weeks.
Among provincial governments, five went center-left and three center-right, ending the 50-50 split among provinces.
"Apart from Milan, the most important other cities are all in our hands," Prodi said.
ANSA reported turnout was lower than expected, just 71.2 percent.