Immanuel on the Green (Episcopal) is an historic church in New Castle, Delaware, listed as a contributing property in the New Castle Historic District. The church is situated near the center of New Castle at the northeast end of the Green, or town common, making it a prominent local landmark and tourist attraction. Operating continuously since 1689, it is the oldest Anglican parish in Delaware and the oldest continuously operating Anglican/Episcopal parish in the country. The church building was constructed between 1703 and 1708 and enlarged in 1822. The interior and roof were rebuilt following a disastrous fire in 1980.