Church of the Immaculate Conception (GPS: xxzz) is a Roman Catholic church in Port Dickson, Negeri Sembilan. The church is on Jalan Seremban, near the town community park. It dates back to the turn of the 20th century, when the Catholic priest Father Antonin Catesson of the Paris Foreign Missions Society established a chapel there by the name of Notre Dame du Port (or "Our Lady of the Harbour"). The name did not stick, so when a church was finally built, it was instead given the name of Our Lady Help of Christians.
Over the decades, the Catholic community did not have a parish priest of their own, but visiting priests would come to Port Dickson every once a month from Seremban. The present Church of the Immaculate Conception was completed in 1971.