The Rastriya Prajatantra Party (Nepali pronunciation: [rasʈrijʌ prʌˈd͡zatʌntrʌ ˈpa(r)ʈi]; Nepali: राष्ट्रिय प्रजातन्त्र पार्टी, lit. 'National Democratic Party'; abbr. RPP, RaPraPa (Nepali: राप्रपा)) is a constitutional monarchist and Hindu nationalist political party in Nepal. Rastriya Prajatantra Party is currently the sixth largest political party in the House of Representatives after winning 5 seats at the 2026 general election and is one of six national parties recognized by the Election Commission.

The party was formed by Panchayat era prime ministers Surya Bahadur Thapa and Lokendra Bahadur Chand in 1990. The party led two coalition governments in 1997 under Thapa and Chand. The two were also appointed prime minister by King Gyanendra in the 2000s; Chand in 2002 and Thapa in 2003.

Rajendra Prasad Lingden is currently serving as party chairman after being elected at the party's general convention in December 2021. Rastriya Prajatantra Party remained as the fifth-largest political party in the House of Representatives after winning 14 seats at the 2022 general election and was one of seven national parties recognized by the Election Commission.

The Rastriya Prajatantra Party was formed by the ruling elite of the Panchayat era on 29 May 1990. The party split in the same year after another group also registered itself with the Election Commission. The two parties had the same name, ideology and statute but different flags and election symbols. The two parties, one led by Surya Bahadur Thapa and the other led by Lokendra Bahadur Chand, contested the 1991 elections. The two parties won four seats between them with Chand's party winning three seats and Thapa's party winning one seat. Following their performance at the elections the two parties agreed to merge into a single Rastriya Prajatantra Party on 8 February 1992.

The party held its first general convention from in 1992 from 11 to 16 June in Kathmandu and unanimously elected Surya Bahadur Thapa as its chairman. Lokendra Bahadur Chand and Rajeshwor Devkota were elected leader and co-chairman, respectively. The party emerged as a third force at the 1992 local elections and the 1994 general elections. The party received 18 percent of the votes and won 20 seats to the House of Representatives, making them the third largest party in the parliament.

The party initially supported the minority government of CPN (UML) but later withdrew their support and backed a no-confidence motion Manmohan Adhikari. The party then joined a coalition government with Nepali Congress and Nepal Sadbhawana Party under the premiership of Congress leader Sher Bahadur Deuba. A faction of the party led by former prime minister Lokendra Bahadur Chand were dissatisfied with the coalition government and in March 1996 some cabinet ministers close to Chand withdrew their support for the Deuba government and resigned before a no-confidence vote was set to table by the opposition CPN (UML). The ministers withdrew their resignation before the no-confidence vote and Deuba won the confidence vote. Six cabinet ministers close to Chand again resigned from the government in December 1996 but supported Deuba in the confidence vote later and rejoined the cabinet.

In March 1997, a faction of the party led by Lokendra Bahadur Chand joined a coalition government with CPN (UML), with Chand as prime minister. On 3 October 1997, the faction led by Surya Bahadur Thapa voted for a no-confidence motion tabled by Nepali Congress and toppled the government. Thapa was then made the prime minister on 6 October 1997 with the support of Congress.

After losing support within his party Thapa asked King Birendra to dissolve the house and call for fresh elections. After the recommendation of the Supreme Court, the King called forth a special session of the parliament to debate the no-confidence motion filed against Thapa. Thapa survived the no-confidence vote and expelled six central committee members for threatening to back a no-confidence motion against him.