Denise Mitchell (born 22 November 1976) is an Irish Sinn Féin politician who has been a Teachta Dála (TD) for the Dublin Bay North constituency since the 2016 general election.

[3][4] A well-known community activist locally, Mitchell is described as being a close ally to Sinn Féin leader Mary Lou McDonald.

[6] In the 2016 general election, she took the fourth of five seats in the newly created Dublin Bay North constituency.

[13] One of five children, Denise Mitchell was born in Sheriff Street before her family moved to Darndale where she grew up.

She worked in a locally-based knitwear factory, Shamrock Apparel, where she served as a shop steward before also having careers with Motorola, Gateway 2000 and Brink's.