Maria Steen

Maria Steen (née Davin) is an Irish barrister, architect, and conservative campaigner and a member of the Iona Institute, a socially conservative and Catholic organisation. She was part of the unsuccessful opposition campaigns against the 2015 referendum to legalise same-sex marriage in Ireland and the 2018 referendum to legalise abortion. She was also part of the successful opposition campaign against the 2024 referendums to expand the constitutional definition of family and to replace language relating to women's duties in the home with a gender-neutral article on care. In 2025, Steen failed in her bid to run in the 2025 Irish presidential election, falling two signatures short of the 20 required from members of the Oireachtas to qualify for the ballot.