Stéphane Mbia Etoundi (born 20 May 1986) is a Cameroonian footballer who plays for Sevilla FC in La Liga, on loan from Queens Park Rangers, as a defensive midfielder.

Mbia has also represented the Cameroon national football team on 41 occasions since winning his first cap in 2005. He has scored a total of 3 goals in his international career, scoring once against Liberia during the 2008 Africa Cup of Nations qualification on the 3 June 2007 and twice versus Tunisia during the quarter-finals of the 2008 Africa Cup of Nations in Ghana on 4 February 2008.

Mbia made his début for the Rennes first team during the 2005–06 season, going on to making a handful of appearances. The Cameroonian scored his first Ligue 1 goal for the club in November 2006 against the incumbent French champions Lyon.

Mbia played international football at junior level for Cameroon. He was part of the Cameroon squad that competed in the 2003 FIFA U-17 World Championship in Finland, where his side were eliminated in the group stage.

He made his debut for the Cameroon national team in 2005. He was part of the squad for the 2008 Africa Cup of Nations in Ghana, where Mbia scored twice against Tunisia in the quarter-finals.

Mbia was part of the Cameroon squad for the 2008 Olympics in China, playing in all four of his teams matches, and scoring once against Honduras. Mbia was also selected to represent Cameroon at the 2010 Africa Cup of Nations in Angola and the World Cup in South Africa.

On 2 June 2014, Mbia was included by Cameroon manager Volker Finke in the final 23-man squad for the World Cup in Brazil.

Mbia is the older brother of footballer Franck Etoundi, who currently plays for FC Zürich of the Swiss Super League.

Mbia holds a French passport, having previously resided in the country for more than five years.

His surname is often misspelt by various media as M'Bia whereas the correct spelling is Mbia without the apostrophe and capital 'B'.

Mbia is married and has a son. The family lives in Camberwell, London.