NA-21 Mardan-I () is a constituency for the National Assembly of Pakistan. The constituency was formerly known as NA-11 (Mardan-III) from 1977 to 2018. The name changed to NA-20 (Mardan-I) after the delimitation in 2018 and to NA-21 (Mardan-I) after the delimitation in 2022.
A total of 1,757 votes were rejected.
A total of 495 votes were rejected.
A total of 3,970 votes were rejected.
General elections were held on 25 July 2018.
General elections were held on 8 February 2024. Mujahid Ali won with 119,068 votes.