Lagoon Mirim or Merín is a large estuarine lagoon which extends from southern Rio Grande do Sul state in Brazil into eastern Uruguay. Lagoa Mirim is separated from the Atlantic Ocean by a sandy, partially barren isthmus. ()
Local name: Lagoa MirimArea: 1542.09 mi²Length: 108 miElevation: 0 ft a.s.l.Coordinates: 32°45'0"S, 52°49'60"W