St. John's Ecclesiastical District, Religious heritage district in downtown St. John's, Canada.

St. John's Ecclesiastical District is a downtown area with churches, schools, and other buildings built by different Christian denominations over time. The structures spread across several blocks and display the architectural styles from the 1800s through the early 1900s.

The district's protection began in 2004, when landscape architect Fred Hann chaired a committee pressing for official recognition. The City of St. John's designated it a municipal heritage district by Municipal Plan Amendment Number 29, approved 8 August 2005, covering about 30 buildings. It was listed on the Canadian Register of Historic Places on 2 December 2005 and designated a National Historic Site of Canada in 2008; a plaque was unveiled in 2010.

The district's name comes from the four denominations that built here: Roman Catholic, Anglican, United Church and Presbyterian. The Benevolent Irish Society building and O'Donel Memorial Hall recall Irish Catholic communal organisation, while the Anglican Cathedral churchyard and Belvedere Cemetery hold graves of clergy and laypeople. The former Long's Hill Catholic and Methodist cemeteries were relocated around 1840–50.

The district is easy to explore on foot and the main buildings like the Basilica and Anglican Cathedral are easily reached. Taking time to visit each area works well, since the buildings spread across different streets.

The buildings were constructed separately by different church groups, each following its own architectural approach without coordination. This independence created a mix of different styles that developed side by side in the same neighborhood.