Capão da Marca Lighthouse, Maritime navigation aid in Capão Comprido, Brazil.

Capão da Marca Lighthouse stands on the shore of Lagoa dos Patos about 11 km southwest of Tavares, Rio Grande do Sul. It is an octagonal iron-framed tower with a lantern and a central cylinder, painted entirely white. It is not to be confused with the Farol Capão da Marca de Fora.

Capão da Marca Lighthouse was inaugurated in 1849 by Emperor Dom Pedro II, making it the first lighthouse built in the then Province of Rio Grande do Sul. It stands on the shore of Lagoa dos Patos about 11 km southwest of Tavares. It is currently out of service, though visits found it fitted with an automatic strobe beacon powered by solar energy.

The lighthouse is the oldest in Rio Grande do Sul, inaugurated in 1849 by Emperor Dom Pedro II himself. Its name refers to the capão, a clump of trees, at the edge of Lagoa dos Patos, about eleven kilometres southwest of Tavares. It should not be confused with the Farol Capão da Marca de Fora.

The lighthouse stands on the shore of Lagoa dos Patos, about 11 km southwest of Tavares, reached by land along the lagoon's western margin. It is not open to the public, and the site is remote, so visitors should arrange their own transport and supplies. The tower is white and octagonal, with a lantern and central cylinder.

The lighthouse's official identifiers are Admiralty G0631.2, NGA 18957 and ARLHS BRA127. Its light flashes for 2 seconds and stays dark for 8 seconds in a 10-second cycle. It should not be confused with the Farol Capão da Marca de Fora, a separate structure.