The Parish of Saint Monica serves all of Atlantic City. It is the union of the city's previously independent five Catholic churches: Saint Nicholas of Tolentine, Our Lady Star of the Sea, Saint Michael, Holy Spirit, and (Old) Saint Monica. Sunday and daily Mass are celebrated in the churches of Our Lady Star of the Sea and St. Nicholas of Tolentine. Mass is celebrated occasionally in St. Michael's Church. All three churches are available for weddings and funerals. The parish has ministries to Hispanic, Vietnamese, and black Catholics.
The parish supports Our Lady Star of the Sea School, the only Catholic school on Absecon Island. It is staffed by the Sisters of Mercy and lay faculty. A Catholic Charities office is located at St. Michael's. The St. Nicholas Shoppe, located at St. Nicholas Church, is the largest Catholic gift shop in South Jersey.