The United States Court of Private Land Claims (1891–1904), was a United States court created to decide land claims guaranteed by the Treaty of Guadalupe Hidalgo, in the territories of New Mexico, Arizona, and Utah, and in the states of Nevada, Colorado, and Wyoming.
During Spanish (1598–1821) and Mexican (1821–1846) rule over what was to become the U.S. Southwest, the governments made land grants to various individuals and communities. Under the Treaty of Guadalupe Hidalgo (1848), which ended the Mexican-American War, the United States obtained these territories, and in Article VIII guaranteed the rights of Mexican and former Mexican citizens to their property. However, the U.S. Senate in ratifying the treaty eliminated Article 10, which stated that the U.S. government would honor and guarantee all land grants awarded in lands ceded to the United States to citizens of Spain and Mexico by those respective governments. Thus land grants were subject to being proved.
In 1851, Congress passed the first legislation implementing the property protection provisions of the Treaty of Guadalupe Hidalgo, however it addressed only the Spanish and Mexican grants in California. Congress focused on California’s land grants first because California was already a populous state, and it wanted to encourage further settlement of the public domain land there.
In 1854 the U.S. Congress established the office of the Surveyor General of New Mexico to ascertain "the origin, nature, character, and extent to all claims to lands under the laws, usages, and customs of Spain and Mexico." At first the Congress tried to deal with each land grant by special bill and the House had a Committee on Private Land Claims, seats on which were sought after as a way of dispensing patronage. By 1880 the corruption inherent in determining these claims by politics rather than on a legal basis forced an end to this practice. For ten years no claims could be proved as against the United States.