The Lithuanian Peasant Popular Union was a political party established in 1905 in the Grand Duchy of Lithuania. It aimed to represent the interests of the rural population, particularly farmers, and sought to promote agrarian reforms and social justice. The party played a significant role in advocating for Lithuanian independence and cultural revival during the early 20th century. The union was instrumental in organizing peasants and raising awareness about their rights and needs. It contributed to the broader movement for Lithuanian nationalism, aligning with other groups like the Lithuanian National Movement. The party's influence waned after World War I, but its legacy remains in Lithuania's political history.