The National Assembly of the Federal Republic of Nigeria is a bicameral legislature established under section 4 of the Nigerian Constitution. It consists of a Senate with 109 members and a 360-member House of Representatives. The body, modeled after the federal Congress of the United States, is supposed to guarantee equal representation with 3 senators to each 36 states irrespective of size in the Senate plus 1 senator representing the Federal Capital Territory and single-member district, plurality voting in the House of Representatives. The National Assembly, like many other organs of the Nigerian federal government is based in Abuja in the Federal Capital Territory.

The Senate is the upper chamber of Nigeria's bicameral legislature, the National Assembly. The National Assembly is the nation's legislature and has the power to make laws, as summarized in chapter one, section four of the 1999 Constitution of Nigeria. The lower chamber is the House of Representatives.