Gemma O'Doherty (born 24 August 1968) is an Irish far-right activist and conspiracy theorist. She began her career as a staff writer for the Irish Independent, contributing articles on travel, the criminal justice system and corruption, but was dismissed in 2013. She attempted to run as a candidate in the 2018 Irish presidential election, but failed to secure the minimum qualifying number of nominations required to be added to the ballot. O'Doherty was unsuccessful in the 2019 European Parliament election in Ireland, receiving 1.85% of first preference votes in the Dublin constituency. She unsuccessfully ran in the 2020 Irish general election receiving just under 2% of first preference votes.