Castel Maggiore

Castel Maggiore
Comune
Comune di Castel Maggiore
The town hall in Castel Maggiore
Coat of arms
Location of Castel Maggiore
Castel Maggiore Location of Castel Maggiore in Italy Castel Maggiore Castel Maggiore (Emilia-Romagna)
Coordinates: 44°34′N 11°22′E
Country	Italy
Region	Emilia-Romagna
Metropolitan city	Bologna (BO)
Frazioni	Boschetto, Primo Maggio, Trebbo, Sabbiuno
Government
• Mayor	Belinda Gottardi
Area
• Total	30.9 km2 (11.9 sq mi)
Elevation	29 m (95 ft)
Population  (2026)
• Total	18,479
• Density	600/km2 (1,500/sq mi)
Demonym	Castelmaggioresi
Time zone	UTC+1 (CET)
• Summer (DST)	UTC+2 (CEST)
Postal code	40013
Dialing code	051
Patron saint	St. Andrew
Saint day	October 30
Website	Official website

Castel Maggiore is a comune in the Metropolitan City of Bologna in the Emilia-Romagna region in Italy.

The earliest records mentioning the Comune, formerly known as Castaniolo (meaning "Little chestnut"), come from the tenth century. According to the mythology, the name originates from a large chestnut trunk that is said to have floated through the Canale Navile, a navigable drain canal, into the comune's territory.

Later, Castaniolo was known as Maggiore (Major) to differentiate it from a namesake hamlet of the comune of Bentivoglio (now Castaniolo Minore).