Elrigh Louw (born 20 September 1999) is a South African professional rugby union player who currently plays for the Bulls in the United Rugby Championship and for the Blue Bulls in the Currie Cup.
Louw attended and played rugby for Hoërskool Transvalia, which earned him a selection to the Falcons squad for the Under-18 Craven Week.
After school, Louw moved to Bloemfontein to join the Free State Cheetahs, representing them at Under-19 and Under-21 level.
He was also called up to the South Africa Under-20 squad, representing them at the 2019 World Rugby Under 20 Championship in Argentina.
He made his first class debut in the opening round of the 2019–20 Pro14 season, coming on as a replacement their 27–31 defeat to the Cardiff Blues.