Isaiah Armstrong-Ravula (born 7 January 2004) is a Fijian rugby union player, who plays for the and . His preferred position is fly-half.
Armstrong-Ravula attended St Andrew's College, Christchurch. He plays his club rugby for College Old Boys. He was named in the Fiji U20 squad in 2023.
Armstrong-Ravula has represented in the National Provincial Championship since 2023, being named in their full squad for the 2023 Bunnings NPC. He was named in the squad for the 2024 Super Rugby Pacific season.