Ruan Jacobs (born 30 June 1988) is a South African rugby union player, currently playing with the Border Bulldogs.
He represented the Blue Bulls at the 2006 Under–18 Academy Week before moving to Bloemfontein, where he represented the Free State Cheetahs in the Under-19 Provincial Championship competition in 2007 and the Under-21 Provincial Championship competition in 2008 and 2009.
He also represented local university side, the UFS Shimlas in the 2008 Varsity Cup.
He was included in the Free State Cheetahs squad for the 2008 and 2009 Vodacom Cup squads and made his senior debut for them in the 80–3 victory over the Griffons in April 2008.
In 2012, he – along with twin brother Niell – signed for East London-based side the Border Bulldogs.