Mah Siew Keong (simplified Chinese: 马袖强; traditional Chinese: 馬袖強; pinyin: Mǎ Xiùqiáng; Jyutping: Maa5 Zau6 Koeng4; Pe̍h-ōe-jī: Má Siū-kiông; Foochow Romanized: Mā Sêu-giòng; born 17 June 1961) is a Malaysian politician who served as Minister of Plantation Industries and Commodities and Minister in the Prime Minister's Department in the Barisan Nasional (BN) administration under former Prime Minister Najib Razak from June 2014 to the collapse of the BN administration in May 2018, Member of Parliament (MP) for Teluk Intan from November 1999 to March 2008 and again from May 2014 to May 2018 and Member of the Perak State Legislative Assembly (MLA) for Pasir Bedamar from April 1995 to November 1999.

Mah steadily rose up the party ranks and held many positions at all the division, state and national levels.

In the aftermath of the 2013 General Election, Mah was also appointed the Secretary-General of Gerakan after the resignation of Teng Chang Yeow.

Mah stepped down on 16 September 2018 and was succeeded by Dominic Lau Hoe Chai as Party President of Gerakan.

Pasir Bedamar is one of the two state seats that form the Teluk Intan Parliamentary Constituency, the other being Changkat Jong.

In 1999, Mah contested Teluk Intan Parliamentary Constituency and defeated Raj Nallaiya of the Democratic Action Party (DAP).

In 2004, Mah was reelected as the Member of Parliament of Teluk Intan by defeating Wu Him Ven of the DAP and N. Gobalakrishnan of the People's Justice Party (PKR).