Sikkim Janata Party was a political party in Sikkim. The party was founded in Gangtok on 18 December 1969 founded by Lal Bahadur Basnet. The party was formed after a split in the Sikkim National Congress. Basnet, a well-known journalist and former general secretary of the Sikkim National Congress, served as the president of the party. K.C. Pradhan was the general secretary of the party. The party was active in the struggle for democratic reforms. It demanded Sikkim adopt a written constitution. The party suffered from weak organization and lack of financial backing. Basnet had himself contested two seats in the election. The party condemned the 1950 treaty as a 'slander on Sikkim'.
Karma Lama of the Sikkim Janata Party contested the Sangha seat, finishing in second place with 46 votes (10.31%).
Following the election, in which the party failed to win any seats, Basnet resigned from the party presidency and left the party. Another key leader of the party, B.B. Gurung, also renounced his membership. After these departures, K.C. Pradhan became the main leader of the party.
On 15 August 1972 SJP reached an agreement with the Sikkim State Congress to merge the two parties.