Richard Arnold (born 1 July 1990) is an Australian professional rugby union player. He plays for Stade Toulousain in the French Top 14 competition. His regular position is lock.
Richie Arnold and his identical twin Rory were born in Wagga Wagga, Australia. Their father Tony was stationed there while in the army. The brothers were raised in Murwillumbah in northern New South Wales where they both played junior rugby league until aged 16.
Richie Arnold followed the path of his brother Rory, joining the Murwillumbah rugby club. He moved to the Gold Coast two years after his brother to play Premier Rugby at the Bond University Rugby Club in 2015. Later that year he joined with Queensland Country and played in Australia's National Rugby Championship. Arnold then signed with the Western Force squad, but injury and rehabilitation following a shoulder reconstruction preventing him from playing in the 2016 season. He made his Super Rugby debut for the Force against the Crusaders in their 2017 Round 5 clash in Christchurch. Arnold moved to French Top 14 side Stade Toulousain in early 2019.