Trinity was a UK newspaper company founded in 1832. It merged with the Mirror to become Trinity Mirror PLC in 1999. In 2015, the company purchased Local World and became the United Kingdom's largest newspaper company. Trinity Mirror purchased the publishing assets of Northern & Shell in 2018 and changed its name to Reach plc.

Over the decades, the company owned many large regional and national newspapers in the United Kingdom and eventually expanded into the North American market. Trinity ran a collection of Canadian community newspapers under its North American subsidiary, Trinity (NA) Holdings, until 1997 when it sold 33 Canadian newspapers to Black Press.