After World War II, Venezia reestablished its name as Associazione Calcio Venezia.
In Italy the national team resumed football in the 1945-46 Italian Football Championship, and Venezia was a bit of a mess, finishing 13th in the league. Serie A was restored in the 1946-47 football season, but even with the thirteen goals scored by Valeriano Ottino (the highest number of goals scored in the course of a Serie A season by a Venezia player) Venezia were relegated to Serie B. The same time, Arnaldo Bennati would leave the presidency. After the most significant moment in the history of the club, the period of uncertainty began.
After finishing fourth place in Serie B in the 1947-48 season, the director of sports Giuseppe Girani and manager Mario Villini helped Venezia to return into Serie A in the 1948-49 season. The team finished second, one point clear of Vicenza.
However, Venezia had to contend with financial instability and financial instability to the point where during 1950-49 Serie A season the club was run by an elected local council. Venezia were forced to sell goalie Adriano Zecca Roma and didn't have the ability to compete in the top league which was why they finished last, with just 16 points. The summer of 1950 saw Mario Renosto was sold to A.C. Milan, and immediately took home the Scudetto with the rossoneri in the next season.
When they regressed in Serie B, Venezia would be a mediocre sixth place during the 1950-51 season, despite the 20 goals scored by Pietro Broccini. He was to leave to join Inter Milan in the summer.
In the 1951-52 season Venezia would be dropped into Serie C, and they would play for four seasons in the third division, prior to being promoted into Serie B in the 1956-57 season under the management of Carlo Alberto Quario.
Although they were still playing as a team in Serie B, Venezia would have a great run in the 1958-1959 Coppa Italia tournament, eliminating Roma and Torino before making it to the semifinals where they would be defeated by Inter and then fall in an in-between match against Genoa. After the conclusion this season the manager Carlo Alberto Quario would leave the bench and Venezia was able to avoid a being relegated in Serie C in the 1959-60 season, and averting an relegation tie-breaker against Monza as well as Taranto.
The 1960-61 Serie B season, entrepreneur Anacleto Ligabue assumed the role of an extraordinary club commissioner and immediately summoned Carlo Alberto Quario to the bench. It would prove to be a profitable move that year, as Venezia was ranked first in the table, and was promoted back to Serie A after an 11-year absence. The team that won promotion featured youthful Venetian Gianni Rossi as well as recent additions Virginio De Paoli, Sergio Frascoli, Gianni Grossi, and striker Luigi Raffin, who scored 17 goals throughout the year. The celebrations were capped off by a procession of gondolas that accompanied the bissona Serenissima the traditional Venetian vessel that carried teams to Stadio Penzo, to Piazza San Marco.
When Venezia returned to Serie A in the 1961-62 season, the Count of Misurata, Giovanni Volpi, was elected club president along with Ligabue, and Enrico Linetti as his deputies. While the team was off slow, Venezia would ultimately put an impressive season together winning against Juventus as well as A.C. Milan, and finishing in 12th place in the league. The team was anchored by the midfielder Juan Santisteban who had arrived from Real Madrid, while Raffin scored 11 goals over the entire season.
In the 1962-63 Serie A season, Venezia was 17th in the league and was relegated back into Serie B. After the campaign, there could be many players who would leave which included Carlo Alberto Quario and Gino Raffin who had scored 39 goals over the last three seasons.
After three years with Serie B, Venezia earned the opportunity to move up onto Serie A once again, being as the first team in 1965-1966 Serie B season. However, in 1966/67 Serie A season, Venezia were immediately sent back in Serie B, and they were not able to compete in the top league for over 30 years. The following season, 1968-67 Serie B season, Venezia was relegated into Serie C.