The Municipality of Cainta (Filipino: Bayan ng Cainta) is a first-class urban municipality in the province of Rizal, Philippines. It is one of the oldest (originally founded on August 15, 1571), and is the town with the second smallest land area of 26.81 km² next to Angono with 26.22 km².
Cainta serves as the secondary gateway to the rest of Rizal province from Metro Manila. Cainta became one of the most urbanized towns due to its proximity to Manila.
With a population of 289,833 inhabitants, Cainta is the second most populous municipality in the Philippines, per the 2007 Census of Population conducted by the National Statistics Office. Its income of PhP490 million makes it the second richest municipality in the country.