Theunis Louis "Theuns" Botha is a retired South African politician of the Democratic Alliance.

He was elected to a full term as Provincial Leader in March 2003, after he defeated Sydney Opperman, Tony da Silva and Pauline Cupido.

Together with Dan Roodt, the far-right founder of the pro-Afrikaans Action Group (PRAAG), their new organisation, tentatively named the "Republican Party", would unite Afrikaans-speakers (both coloured and white) with Zulu-speakers led by Jacob Zuma, who had been fired as deputy president and was in the political wilderness.

In September 2007, when cabal members Kent Morkel and Kobus Brynard walked out, Theuns Botha unexpectedly decided to stay in the DA as provincial leader.

[10] During a parliamentary debate in May 2013, Botha was accused of using the racist Afrikaans slur "bobbejaan" (baboon) in reference to African National Congress member Zodwa Magwaza.

[11] In December 2014, Premier Helen Zille announced that Botha and Nomafrench Mbombo would exchange ministerial positions.