Eugene Jantjies (born 10 August 1986 in Gobabis, South-West Africa) is a Namibian rugby union scrum-half, currently playing for the Welwitschias.

Since his debut in 2006 against Kenya in Windhoek, Jantjies has played in 67 matches for Namibia, which is the overall national record for the most number of Test caps.

He was called for the 2007 Rugby World Cup in France, playing in four games but without scoring.

His selection for the 2019 Rugby World Cup in Japan makes him the first Namibian to appear in four RWC tournaments.

Jantjies’s 50th Test match came off the bench during the 34-32 win against Spain during the 2016 World Rugby Nations Cup tournament in Bucharest.