The Obelisk of Montevideo, officially Obelisk to the Constituents of 1830 (Spanish: Obelisco a los Constituyentes de 1830) is a monument created by sculptor José Luis Zorrilla de San Martín (1891-1975).

It is a three-sided obelisk made of granite, 40 metres (130 ft) tall with three bronze statues on its sides, representing "Law", "Liberty" and "Force".

It is located at the intersection of 18 de Julio and Artigas Boulevard avenues, in Montevideo, at the entrance of the Parque Batlle area.

[1] Six years later, a similar but larger monument was built at the intersection of 9 de Julio and Corrientes avenues in Buenos Aires, to celebrate the 400th anniversary of the first founding of the city.

In 1983 it was the site of the largest demonstration in the history of the country, the Río de Libertad.