Louis Deacon (born 7 October 1980 in Leicester) is a former English professional rugby union footballer.

He made his first team debut in August 2000 as a replacement against Cardiff and has established himself as a highly dependable player and equally at home at the front or middle of the line out.

Having lived in the shadow of the England pairing of Martin Johnson and Ben Kay for several seasons, he took the opportunity in 2003–04 to command a regular place during the World Cup.

He then went on to play in every RBS 6 Nations Championship match last season, as he had done three years earlier, which not only illustrated the skill, but the resolution of Deacon, who went on to miss the summer tour of Australasia and the Investec Internationals through a back injury, which was a similar injury to when he underwent surgery on a prolapsed disc in June 2008 that ruled him out of the Investec Challenge Series and the subsequent RBS 6 Nations Championship.

[12] After retirement, Deacon took up coaching roles with England men’s U20s, the Spanish national team and in the Leicester Tigers community department.