Holy Trinity Church, also known as Old Swedes, is a historic church at East 7th and Church Street in Wilmington, Delaware. It was consecrated on Trinity Sunday, June 4, 1699, by a predominantly Swedish congregation formerly of the colony of New Sweden. The church, designated a National Historic Landmark in 1961, is among the few surviving public buildings that reflect the Swedish colonial effort. The church is considered part of First State National Historical Park. The church, which is often visited by tourists, remains open for tours and religious activities.

Wilmington is the largest city in the U.S. state of Delaware. The city was built on the site of Fort Christina, the first Swedish settlement in North America. It lies at the confluence of the Christina River and Brandywine Creek, near where the Christina flows into the Delaware River. It is the county seat of New Castle County and one of the major cities in the Delaware Valley metropolitan area. Wilmington was named by Proprietor Thomas Penn after his friend Spencer Compton, Earl of Wilmington, who was prime minister during the reign of George II of Great Britain.