Sirsa Lok Sabha constituency (Hindi: सिरसा लोकसभा निर्वाचन क्षेत्र) is one of the 10 Lok Sabha (parliamentary) constituencies in Haryana state in northern India. This constituency covers the entire Sirsa and Fatehabad districts and part of Jind district of the state. It is reserved for the Scheduled caste candidates since its inception in 1967.
At present, Sirsa Lok Sabha constituency comprises nine Vidhan Sabha (legislative assembly) constituencies. These are: