Horace Thomas Johnson (30 December 1886 – 12 August 1966) was a cyclist from Great Britain.

By the age of 20, in 1908, he won a silver medal at the 1908 Summer Olympics in London, competing with Frederick (E.G.) Hamlin in the 2,000 metre tandem race.

[3] At the 1920 Summer Olympics held in Antwerp, he won the silver medal after finishing second in the 1,000 metre individual sprint with a time of 15.1 seconds, identical to Harry Ryan who was awarded the bronze medal.

The team, which also included Cyril Alden, William Stewart, and Albert White, finished in the silver medal position with a time of 5 minutes 13.8 seconds.

In 1922, at the World Amateur Track Championships in Paris, he won the men's sprint title, beating the Olympic champion Maurice Peeters and teammate W.