Alverca do Ribatejo is a city (cidade) and a parish (freguesia) in Vila Franca de Xira Municipality in Portugal. It covers an area of 17.89 km² and had a population of 29,086 as of 2001. It was promoted to city status in 1990. It is a city and a suburb near the Tagus River (rio Tejo), in the Lisbon Metropolitan Area. The aerospace company Oficinas Gerais de Material Aeronáutico (OGMA) is based there.