National Progressive Party () was a political party in Laos in the 1950s. The party was founded in 1950 by former Lao Issara members Xieng Mao, Souvanna Phouma, and Katay Don Sasorith.
In the August 1951 elections for the National Assembly of Laos, the party won 19 of 39 seats, which was considered a landslide victory; in 1955, won with 23 of 39 seats. The party's leader, Souvanna Phouma, became prime minister.
Following the 1958 election, the party dissolved when it merged with the Independent Party into the Lao People's Rally.