Calamba, officially the City of Calamba (Filipino: Lungsod ng Calamba), is a 1st class component city in the province of Laguna, Philippines. According to the 2020 census, it has a population of 539,671 people.Calamba is the regional center of the Calabarzon region. It is situated 50 kilometers (31 mi) south of Manila and 37 kilometers (23 mi) west of Santa Cruz. The city is known as the "Spring Resort Capital of the Philippines" because of its numerous hot spring resorts, which are mostly located in Barangays Pansol, Bucal, Bagong Kalsada, and Lingga.
According to the 2020 census, Calamba has a population of 539,671 people, making it the most populous local government unit in Laguna. It is the fifth-densest city in the province with more than 2,600 people per square kilometer after San Pedro, Biñan, Cabuyao, and Santa Rosa. Based on the overall rankings of the 2014 Cities and Municipalities Index, the city ranked 18th in the overall competitiveness (cities ranking) and first among cities in the Calabarzon region. Calamba is known to be Calabarzon's richest city because of its numerous industries.Calamba is the hometown of the de facto Philippine national hero, José Rizal.