Isabel Rendeiro Marques Mendes Lopes (born 28 February 1982) is a Portuguese civil engineer, politician and member of the Assembly of the Republic, the national legislature of Portugal. A member of the LIVRE party, she has represented Lisbon since March 2024.
Interested in building a more just and dignified society and strengthening democracy, Lopes was involved with the Congresso Democrático das Alternativas (Democratic Congress of Alternatives) and similar organisations.[7] She has been a member of the LIVRE party since its foundation in 2013 and was part of the Contact Group, the party's executive body, from 2015 to 2022.[4][8] She was a political advisor to LIVRE's parliamentary office from 2022 to 2024.[3][4] She has been a member of Lisbon City Council since 2021.[3][5] At the 2022 legislative election Lopes was placed second on LIVRE's list of candidates in Lisbon but the party only won a single seat in the constituency.[9] She was elected to the Assembly of the Republic at the 2024 legislative election.[10] After the election the party's parliamentary group unanimously chose Lopes to be its leader.[2][4]