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. According to the census of 2004, its population was 7,798. The name of the resort is in association with the saline waters of the lake just north of Avenida Luis Giannattasio (lake by the sea, sea being the Rio de la Plata). Lagomar was created as a resort in 1952 and was developed as part of the Costa de Oro near Montevideo and Canelones. It changed its profile from the 1970s, when it gradually reached a breaking point because of population pressure, becoming a permanent residential area for the middle and upper middle classes. Between 1985 and 1996 the population grew 42%. To meet this population increase, in the second half of the 1990s it became further urbanized with shops and facilities. The resort became part of the Ciudad de la Costa by Act of October 19, 1994.