| Name | Country | Feature class | Latitude | Longitude | |
|---|---|---|---|---|---|
4951  | Estero del Burro | Argentina, Santa Fe | lake | S 28° 5′ 0'' | W 60° 6′ 0'' |
| 4952 | Lago Burmeister | Argentina, Santa Cruz | lake | S 47° 57′ 24'' | W 72° 8′ 57'' |
| 4953 | Laguna del Buey | Argentina, Santa Fe | lake | S 33° 52′ 0'' | W 61° 10′ 0'' |
| 4954 | Laguna Buen Abrigo | Argentina, Rio Negro | lake | S 41° 30′ 0'' | W 67° 59′ 0'' |
| 4955 | Laguna Bruno | Argentina, Santa Fe | lake | S 31° 50′ 50'' | W 60° 41′ 23'' |
| 4956 | Laguna del Brealito | Argentina, Salta | lake | S 25° 17′ 56'' | W 66° 22′ 0'' |
| 4957 | Pozo de la Brea | Argentina, Chaco | lake | S 24° 22′ 0'' | W 61° 59′ 0'' |
| 4958 | Laguna Brava Grande | Argentina, Entre Rios | lake | S 33° 2′ 57'' | W 60° 30′ 53'' |
| 4959 | Laguna Brava | Argentina, La Rioja | lake | S 28° 19′ 43'' | W 68° 51′ 43'' |
| 4960 | Laguna Blanca Grande | Argentina, Buenos Aires | lake | S 36° 29′ 0'' | W 60° 54′ 0'' |
| 4961 | Laguna Blanca Chica | Argentina, Neuquen | lake | S 38° 57′ 35'' | W 70° 23′ 18'' |
| 4962 | Laguna Blanca | Argentina, Santa Cruz | lake | S 48° 28′ 0'' | W 67° 39′ 0'' |
| 4963 | Laguna Blanca | Argentina, Chubut | lake | S 44° 27′ 56'' | W 66° 18′ 4'' |
| 4964 | Laguna Blanca | Argentina, Chubut | lake | S 43° 57′ 0'' | W 68° 45′ 0'' |
| 4965 | Laguna Blanca | Argentina, Chubut | lake | S 42° 57′ 26'' | W 69° 55′ 12'' |
| 4966 | Laguna Blanca | Argentina, Neuquen | lake | S 40° 37′ 12'' | W 71° 19′ 59'' |
| 4967 | Laguna Blanca | Argentina, Buenos Aires | lake | S 39° 40′ 4'' | W 63° 17′ 24'' |
| 4968 | Laguna Blanca | Argentina, Rio Negro | lake | S 39° 22′ 0'' | W 68° 8′ 42'' |
| 4969 | Laguna Blanca | Argentina, Mendoza | lake | S 35° 5′ 54'' | W 69° 38′ 7'' |
| 4970 | Laguna Blanca | Argentina, Jujuy | lake | S 23° 1′ 0'' | W 65° 6′ 0'' |
| 4971 | Laguna Blanca | Argentina, Jujuy | lake | S 22° 53′ 51'' | W 66° 26′ 5'' |
| 4972 | Laguna Bismarck | Argentina, Santa Cruz | lake | S 51° 51′ 44'' | W 69° 43′ 52'' |
| 4973 | Laguna Beltrán | Argentina, Cordoba | lake | S 29° 53′ 14'' | W 62° 16′ 41'' |
| 4974 | Beagle Channel  Beagle Channel,Beagle Kanali,Beagle Kanalı,Beagle'i vaein,Beagle'i väin,Beagle-Kanal,Bigl,Canal Beag... | CL,AR | marine channel | S 54° 55′ 11'' | W 68° 38′ 55'' |
| 4975 | Laguna Baya | Argentina, Catamarca | lake | S 26° 14′ 26'' | W 66° 58′ 42'' |
| 4976 | Laguna Batalla | Argentina, Entre Rios | lake | S 32° 44′ 38'' | W 60° 10′ 26'' |
| 4977 | Laguna Barrientos | Argentina, Cordoba | lake | S 30° 16′ 25'' | W 62° 35′ 47'' |
| 4978 | Pozo de los Barriales | Argentina, Chaco | lake | S 24° 27′ 0'' | W 62° 2′ 0'' |
| 4979 | Laguna Barrancosa | Argentina, Rio Negro | lake | S 41° 5′ 37'' | W 65° 17′ 14'' |
| 4980 | Laguna Bajo Fondo | Argentina, Rio Negro | lake | S 39° 18′ 0'' | W 65° 21′ 0'' |
| 4981 | Laguna Bajo de Picaso | Argentina, Santa Cruz | lake | S 49° 3′ 0'' | W 68° 28′ 0'' |
| 4982 | Laguna del Bajo | Argentina, Santa Cruz | lake | S 49° 22′ 11'' | W 69° 18′ 35'' |
| 4983 | Laguna Bajada de las Yeguas | Argentina, Mendoza | lake | S 34° 47′ 33'' | W 67° 52′ 14'' |
| 4984 | Laguna Azul | Argentina, Santa Cruz | lake | S 48° 29′ 0'' | W 67° 38′ 0'' |
| 4985 | Laguna Azul | Argentina, Santa Cruz | lake | S 48° 14′ 50'' | W 67° 9′ 36'' |
| 4986 | Lago Azara Lago Azara | Argentina, Santa Cruz | lake | S 47° 50′ 10'' | W 72° 20′ 19'' |
| 4987 | Laguna Avestruz | Argentina, Rio Negro | lake | S 39° 41′ 42'' | W 63° 57′ 52'' |
| 4988 | Laguna Arturo | Argentina, Tierra del Fuego | lake | S 53° 43′ 0'' | W 68° 18′ 53'' |
| 4989 | Laguna Arturo | Argentina, Santa Cruz | lake | S 51° 46′ 58'' | W 70° 9′ 38'' |
| 4990 | Laguna Artillosa | Argentina, Tierra del Fuego | lake | S 53° 35′ 17'' | W 68° 2′ 47'' |
| 4991 | Laguna de los Arroyitos | Argentina, Cordoba | lake | S 33° 22′ 0'' | W 64° 22′ 0'' |
| 4992 | Laguna Arenal | Argentina, Jujuy | lake | S 22° 39′ 42'' | W 66° 42′ 5'' |
| 4993 | Laguna Aracar | Argentina, Salta | lake | S 24° 14′ 0'' | W 67° 45′ 0'' |
| 4994 | Laguna Aparoma | Argentina, Catamarca Departamento de Belén | lake | S 26° 15′ 4'' | W 66° 51′ 56'' |
| 4995 | Laguna Antuk | Argentina, Tierra del Fuego | lake | S 54° 24′ 0'' | W 67° 23′ 0'' |
| 4996 | Laguna de Antofagasta | Argentina, Catamarca | lake | S 26° 6′ 34'' | W 67° 23′ 31'' |
| 4997 | Laguna de la Antilla | Argentina, Buenos Aires | lake | S 38° 2′ 0'' | W 60° 48′ 0'' |
| 4998 | Pozo del Anta | Argentina, Chaco | lake | S 24° 26′ 0'' | W 62° 7′ 0'' |
| 4999 | Laguna Aña | Argentina, Jujuy | lake | S 23° 31′ 46'' | W 66° 56′ 18'' |
| 5000 | Laguna Ameghino | Argentina, Santa Cruz | lake | S 51° 46′ 17'' | W 72° 1′ 38'' |
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