Tassy Johnson (22 September 1916 – 24 April 1981) was an Australian cyclist. He competed in the individual road race and the time trial events at the 1936 Summer Olympics and won a silver medal in the Time Trial at the 1938 British Empire Games in Sydney.

Following his retirement from cycling, Johnson refereed 27 of the 29 Sun cycling tours of Victoria, Australian championships and the Bendigo Madison.

Johnson died of a heart attack aged 65 in Melbourne on 24 April 1981.