In the new division of Montevideo in Municipios and Centros Comunales Zonales, Casavalle belongs to CCZ 11 of Municipio D. Casavalle borders the barrios Manga, Toledo Chico and Manga to the north, Piedras Blancas to the east, Las Acacias, Montevideo and Cerrito de la Victoria to the southeast, and Peñarol - Lavalleja to the west.

According to the same source, the limits of the barrio are: Aparicio Saravia Boulevard, Pedro de Mendoza Avenue, Camino Carlos A. López, Instrucciones Avenue and the stream Arroyo Miguelete.

According to the limits traced by the Instituto Nacional de Estadistica in 2004, the Cementerio del Norte, by far the biggest cemetery of Montevideo, as well as a small area east of Pedro de Mendoza Avenue are part of this barrio.

In Casavalle have lived great personalities of the history of the Rio de la Plata, as Cap.

In 1908, mainly by the creation of Barrio Plácido Ellauri by Francisco Piria, a transformation of the locality started, which eventually integrated Casavalle to the urban area of Montevideo.