Westerlo is a municipality located in the Belgian province of Antwerp. The municipality comprises seven towns: - Westerlo centrum (population 3,831) - Oevel (population 3,454) - Tongerlo (population 4,679) - Heultje (population 3,973) - Voortkapel (population 2,408) - Oosterwijk (population 2,350) - (...) (from Wikipedia)