The 1914–15 season was the 21st in the history of the Southern League. Watford won Division One and Stoke finished top of the Division Two. Stoke were the only club to apply for election to the Football League and were successful. However, the United Kingdom declared war on Germany on 4 August 1914, thus entering World War I. The Football League and Southern League ceased operations until the war ended in November 1918. The next season would be 1919–20.