Bill O'Brien (footballer, born 1887)

William Joseph O'Brien (27 September 1887 – 18 January 1943) was an Australian rules footballer who played with St Kilda in the Victorian Football League (VFL).

O'Brien was also a policeman, and then a farmer in Ariah Park, enlisted for part-time duty in the Volunteer Defence Corps during World War II at the age of 55, but died before the end of the war.