St. Mary of the Assumption Parish in Bridgeton, Missouri was a Catholic parish in northwestern St. Louis County, located within the Archdiocese of St. Louis. Founded in 1851, the parish population expanded with suburban development at such exhilarating a rate in the 1950s and 1960s that seven new parishes were created in the area. This parish was closed in 2001 due to planned expansion of St. Louis Lambert Airport. The parish church and related buildings were acquired by the airport and razed in 2004.