Tirupattur district, or Tirupathur district, is one of the 38 districts in the southern Indian state of Tamil Nadu. The district was formed in 2019 by the division of Vellore district into three smaller districts. Its creation alongside Ranipet district was announced on 15 August 2019, and it was officially declared on 28 November 2019. The town of Tirupattur serves as the district headquarters.