John Chalmers (1874–1962) was an American football, basketball and baseball coach

John Chalmers may also refer to:

• John Chalmers (orthopaedic surgeon) (born 1927), Scottish orthopaedic surgeon
• John Chalmers (moderator), minister of the Church of Scotland
• John Chalmers (missionary) (1825–1899), Scottish Protestant missionary in China and translator
• John Chalmers (trade unionist) (1915–1983), Scottish trade unionist
• John Alan Chalmers (1904–1967), British atmospheric physicist

• Saint John's University (Thailand)
• Saint John's wort
• Saint John Talbot
• Saint John Telegraph-Journal
• Saint John the Baptist (Alonso Cano)
• Saint John the Baptist and Saint Miniato Icons
• Saint John the Baptist at the Beguinage
• Saint John the Baptist at the Béguinage
• Saint John the Baptist at the Béguinage, Brussels
• Saint John the Baptist Catholic Church (Honolulu. Hawaii)
• Saint John the Baptist Catholic School
• Saint John the Baptist Catholic School (San Juan City)
• Saint John the Baptist Catholic School (San Juan, Metro Manila)
• Saint John the Baptist Church (Daet)
• Saint John the Baptist Church, Livno
• Saint John the Baptist Church, Târgu Mureş
• Saint John the Baptist, Maddermarket, Norwich
• Saint John the Baptist Parish Church (Calamba)
• Saint John the Baptist Parish Church (Liliw)
• Saint John the Baptist (Rodin)
• Saint John the Baptist Roman Catholic Parish Church of Lanckorona
• Saint John the Baptist's Church, Landskrona
• Saint John the Baptist (Titian)
• Saint John, the Beheaded
• Saint John the Evangelist Catholic Church Complex