Cecilia Moreau (born 5 December 1976) is an Argentine politician, currently serving as National Deputy representing Buenos Aires Province since 2015, and as President of the Chamber of Deputies from 2022 to 2023. She is the first woman to hold that position. Previously, from 2007 to 2011 and again in 2015, Moreau served as a member of the Buenos Aires Province Chamber of Deputies elected in the First Electoral Section.

A longtime member of the Radical Civic Union (UCR), Moreau left and joined the Renewal Front in 2014. Since 2019, she has sat in the Frente de Todos parliamentary bloc in the Chamber of Deputies. She is the daughter of prominent UCR leader Leopoldo Moreau, a former President of the Chamber of Deputies.

Cecilia Moreau was born on 5 December 1976 in Olivos, a suburb in the Greater Buenos Aires conurbation.^[1] She is the daughter of Leopoldo Moreau, a prominent Radical Civic Union leader who served as president of the Argentine Chamber of Deputies and as the UCR's presidential candidate in 2003. She has four siblings, one of which, Carmela, is also active in politics.^[2]

Moreau became politically involved from a young age. She followed her father's footsteps in joining the UCR, and in 2001, she was appointed secretary general of the Juventud Radical [es]. From 2005 to 2008, she was secretary of political action in the Radical Committee of Buenos Aires Province.^[3]

Moreau was elected to the Buenos Aires Province Chamber of Deputies at the 2007 provincial elections; she ran in the UCR list in the First Electoral Section. She finished her mandated in 2011, and later served in the Provincial Chamber briefly between August and December 2015.^[3]

Between 2012 and 2014, Moreau was secretary general of the Radical Civic Union committee in Buenos Aires Province.^[4] In 2014, she left the UCR and joined the Renewal Front, led by former Cabinet Chief Sergio Massa.^[5] Media attention centered around the apparent split between Moreau and her father, both of whom had defected the UCR, but to different parties.^[6][7]

Moreau was a vocal supporter of the legalisation of abortion in Argentina, and voted consistently in favour of the two Voluntary Interruption of Pregnancy bills, in 2018 and 2020.^[15] During the 2020 debate in the parliamentary commission on general legislation, Moreau spoke on how she carried out a clandestine abortion when she was 16, and how the experience motivated her to vote in favour of the bill.^[16][17]

Moreau was married to fellow politician Leandro Santoro, a political protegé of her father's.^[18][19] Santoro and Moreau have a daughter.^[20] Since 2021, Santoro has served in the Chamber of Deputies alongside both Moreaus.