Anthony "Tony" Thiessen (born 25 May 1942) is a former Australian rules footballer who played with Melbourne, Carlton and North Melbourne in the Victorian Football League (VFL).
Thiessen was a key forward, recruited to Melbourne from Sandy Bay. He made seven appearances in the 1963 VFL season and was then delisted, missing out on a chance to be part of Melbourne's 1964 premiership. After playing for Carlton in 1964, he was cleared to North Melbourne where he would be used as a midfielder. It was his only year at North Melbourne, which gave him the unusual distinction of having played with three separate clubs in a three season career. He also played with the Waverley Football Club, in the Victorian Football Association.
James Thiessen, his son, was a member of Adelaide's 1998 AFL premiership team.