Gerenzago is a comune (municipality) in the Province of Pavia in the Italian region Lombardy, located about southeast of Milan and about east of Pavia.
Gerenzago borders the following municipalities: Copiano, Corteolona e Genzone, Inverno e Monteleone, Magherno, and Villanterio. Economy is mostly based on agriculture and craftmanship, in particular related to building activities.
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