Missaglia (Brianzöö: Massaja) is a comune (municipality) in the Province of Lecco in the Italian Lombardy region, located at the centre of the area known as the Meratese. As of 31 December 2004, it had a population of 7,805. The comune, which covers an area of 11 square kilometres (4.2 sq mi), contains the frazioni (subdivisions, often villages or hamlets) of Contra, Lomaniga, Maresso and Missagliola

Missaglia borders the following comuni:

• Casatenovo
• Lomagna
• Montevecchia
• Monticello Brianza
• Osnago
• Perego
• Sirtori
• Viganò

Missaglia is twinned with La Roche-Posay in France.

Among the sites are the town library and the church of San Vittore.