Walter Lennie Allan (24 December 1868 – 1 November 1943), usually known as Watty Allan, was a Scottish footballer who played as an inside-forward. He played for a number of clubs during his career, most notably Watford and Blackpool. Having previously played in the Second Division with Rotherham Town and Loughborough, he played one season in the Southern League for Watford at inside-left, scoring one goal. After leaving Watford, he joined Blackpool. He died in the town in 1943, aged 74.