Lagomar is a residential neighbourhood and resort of Ciudad de la Costa in Canelones, Uruguay.

This resort is located just east of the Carrasco neighborhood (barrio) of eastern Montevideo, on the Río de la Plata coast.

Lagomar was created as a resort in 1952 and was developed as part of the Costa de Oro near Montevideo and Canelones.

Lagomar is divided by the long Avenida Luis Giannattasio, along which are concentrated the main commercial and service activities of the place.

The major roads named Rio de Janeiro and Buenos Aires connect this avenue to the Rambla on coast.