Maria de Assunção de Oliveira Cristas Machado da Graça (born 28 September 1974) is a Portuguese lawyer, professor and politician. She was the President of the CDS – People's Party from 2016 to 2020.

Since 2017 she's also opposition leader councilwoman in the Lisbon City Council, elected with 21% of popular vote.

From 2011 to 2015, she served as Minister of Agriculture, Sea, Environment and Territorial Planning in the government led by Pedro Passos Coelho.

She is a lawyer by training and a professor at the New University of Lisbon. She graduated in law in 1997 by the University of Lisbon,^[1] was admitted in the Portuguese Bar Association in 1999 and completed her doctorate in Private Law in 2004.

Assunção Cristas has been a member of Democratic and Social Centre - People's Party since 2007. She was first elected to the Assembly of the Republic in 2009 elections, representing Leiria. She was re-elected in 2011 elections, participating in the negotiations between her party and the winning Social Democratic Party to form a coalition government.

Cristas led the CDS-PP into the 2019 elections. Her party was defeated, with the CDS-PP losing 13 seats and retaining only 5. She announced her resignation as leader of CDS-PP that evening.^[2]

• Ministry of Agriculture, Sea, Environment and Spatial Planning