Parliamentary elections were held in Lithuania on 8 October 2000. All 141 seats in the Seimas were up for election, 71 of them in single-seat constituencies based on first-past-the-post voting; the remaining 70, in a nationwide constituency based on proportional representation. Altogether, around 700 candidates competed in the single-seat constituencies, while over 1,100 candidates were included in the electoral lists for the nationwide constituency.

The Seimas of the Republic of Lithuania, or simply the Seimas, is the unicameral legislative body of the Republic of Lithuania. The Seimas constitutes the legislative branch of government in Lithuania, enacting laws and amendments to the Constitution, passing the budget, confirming the Prime Minister and the Government and controlling their activities.