The National Congress of Nicaragua () was the legislature of Nicaragua before the Nicaraguan Revolution of 1979.
The congress was bicameral, and consisted of Chamber of Deputies () and Senate ().
The Chamber of Deputies had 42 members (in 1968). They were popularly elected at-large, with one deputy for each 30 000 citizens. The Chamber of Deputies was the stronger chamber, all legislation was introduced there. The Senate was able block bills from the Chamber of Deputies with two-thirds majority.
The Senate had 18 senators (in 1968). There was one senator for each of the 16 national departments, and senators-for-life (former Presidents of the Republic), and one senator who was the runner-up in the latest presidential elections.
One-third representation of the major opposition party was guaranteed in both houses.
The congress met in the National Palace.