Trinity church, Orthodox church in Krasnoye Selo, Russia.

Trinity Church is a stone Orthodox church in Krasnoye Selo built in the Anninsky Baroque style, with a bell tower and spire reaching about 32 metres. Its walls and vaults were decorated with painted ornaments, and it formerly held a tall white five-tier iconostasis with gilded carving, destroyed in the late 1930s and now being recreated in stages. Only the central altar is currently in use.

The first church in Krasnoye Selo was a wooden one dedicated to Saint Catherine, built under Catherine I and destroyed by fire in 1732. The stone church was begun in 1733 with donations from Empress Anna Ioannovna, designed by Ivan Blank, and its main altar was consecrated in 1735. In 1851–1854 it was rebuilt and enlarged to a design by Alexander Rezanov, and a stone chapel was added to the churchyard wall in 1854.

The church was the main temple of Krasnoye Selo, the summer military capital of the Russian Empire, and Romanov rulers from Catherine I to Nicholas II prayed here. Its revered icon of the Christ Child with Simeon, found in 1800, was kept here until the church closed; since 2016 a copy is displayed while the original is in the Church of Simeon the God-Receiver.

The church is located at Lenin Avenue 108 and welcomes visitors during regular daily prayer services. It is helpful to check opening times in advance and wear appropriate clothing when visiting a religious site.

The bell tower's spire rises about 32 metres; its ten bells once included a 2.68-tonne great bell cast in 1764. The present great bell was cast in 2002. The white five-tiered iconostasis with gilded ornament was destroyed when the church closed in the late 1930s, and a copy is being made in stages.