St. John's Lodge may refer to:

In architecture:

• St John's Lodge, London, a Grade II* listed house in Regents Park, London

Two titles in the Baronetage of the United Kingdom:

• The Goldsmid baronets, of St John's Lodge in the County of Surrey
• The Cuyler baronets, of St John's Lodge in Welwyn in the County of Hertford

One of hundreds of Masonic lodges by that name, including:

• St. John's Lodge (New York), who possess the George Washington Inaugural Bible
• St. John's Lodge (Boston), the oldest lodge of the Grand Lodge of Massachusetts, founded in 1733
• St. John's Provincial Grand Lodge, the forerunner of the Grand Lodge of Massachusetts
• St. John's Lodge, Portsmouth, New Hampshire, which claims to be the oldest operating lodge in the Americas
• St. John's Lodge (Newport), the oldest lodge in Rhode Island
• St. John's AF & AM Lodge, also known as Tyler Masonic Lodge in Tyler, Texas
• St. John's No. 1 Lodge, more commonly known as the Tun Tavern Lodge in Philadelphia, with the oldest Masonic document in America