Lucknow Lok Sabha constituency is one of the 80 Lok Sabha (parliamentary) constituencies in Uttar Pradesh state in northern India.

It is one of the two lok sabha constituencies that lies in the largest and capital city of the state, Lucknow.

Its best-known MP is Former Prime Minister, Atal Bihari Vajpayee.

Vajpayee contested from this seat eight times.

After these 3 losses, he won the seat five consecutive times, in 1991, 1996, 1998, 1999 and 2004.