Lakes and standing inland waters

Randijaure

Randijaure (Ráddnávrre) is a 51 km² regulated lake in Jokkmokk Municipality, Norrbotten, Sweden, on the Lilla Luleälven; oligotrophic, max depth 31 m, reservoir of the Randi hydropower station built from 1973.

Raystown Lake

Raystown Lake: 8,300-acre US Army Corps of Engineers reservoir on the Raystown Branch of the Juniata River in Huntingdon and Bedford Counties; Pennsylvania's largest lake entirely within the state, dam built 1968-1973.

Red (レット湖)

Red Lake (レット湖): Upper and Lower Red Lake, Minnesota's largest inland lake at 288,800 acres, mostly within the Red Lake Indian Reservation, famed for a walleye fishery that collapsed in the 1990s and reopened in 2006.

Reelfoot Lake

Reelfoot Lake is a shallow natural lake in northwestern Tennessee, the state's largest natural lake at 10,427 acres, formed by subsidence during the February 1812 New Madrid earthquake.

Rice Lake (Ontario)

Rice Lake is a warm, shallow lake in southern Ontario, about 30 kilometers long, named for the wild rice that once grew there and home to the ancient Serpent Mounds.

Ringkøbing Fjord

Ringkøbing Fjord, a ~300 km² shallow brackish coastal lagoon on Denmark's west coast, cut off from the North Sea by Holmsland Klit and regulated since 1931 by the Hvide Sande sluice; Ramsar and Natura 2000 site famed for waterbirds and Tipperne reserve.

Ronge

Ronge: Lac la Ronge, fourth-largest lake in Saskatchewan (1,414 sq km, 364 m elevation), and town of La Ronge on its west shore; fur-trade center, provincial park, dammed since 1966.

Roopkund (रूपकुंड)

Roopkund (रूपकुंड), Skeleton Lake, is a glacial lake at 5,029 m in Chamoli, Uttarakhand, on the Nanda Devi Raj Jat route. Ancient DNA shows three groups: South Asians (~800 CE), eastern Mediterraneans (~1800 CE), one Southeast Asian.

Røssvatnet

Røssvatnet (Reevhtse) is a regulated lake in Hattfjelldal and Hemnes, Nordland, Norway; after 1950s damming it is Norway's second largest lake at 219 km² and third largest hydropower reservoir, 2.0 TWh, feeding the Røssåga power stations.

Rukwa (landform)

Rukwa (landform): Lake Rukwa, a shallow alkaline outlet-less rift lake in southwestern Tanzania, in the Rukwa Rift of the East African Rift system; about 3 m deep, seismically active, Tanzania's third largest fishery.

Saimaa

Saimaa (Saimen) is Finland's largest lake and Europe's fourth largest, a 4,400 km² labyrinth of about 14,000 islands in South Karelia and South Savo, home of the endangered Saimaa ringed seal and drained by the Vuoksi River into Lake Ladoga.

Sakami (lake)

Lac Sakami (Lake Sakami) is a 738 km² freshwater reservoir in Eeyou Istchee Baie-James, Quebec, enlarged from 533 km² to feed the Robert-Bourassa plant via diverted Eastmain and Opinaca rivers.

Salar de Uyuni

Salar de Uyuni, Bolivia's Andean salt flat of about 10,000 km² at 3,650 m altitude, is the world's largest salt flat and largest known lithium deposit, with state lithium production by YLB, major tourism, and acute water-footprint concerns.

Salt evaporation pond

Salt evaporation pond, also called saltern or solar pond: shallow diked basins where seawater or brine evaporates to crystallize salt, concentrate lithium, or dispose of wastewater; salinity staged through pond chains with fractional crystallization.

Salt pond

Salt pond: a shallow saline pond, natural or levee-enclosed (also called salt pan, saltern), where evaporation concentrates brine for salt harvesting; famous examples include San Francisco Bay's Cargill ponds and Maras, Peru.

Salton Sea

Salton Sea: shallow, saline terminal lake in southern California's Imperial and Riverside counties, California's largest lake, formed 1905-1907 by a Colorado River canal breach, sustained by farm runoff, shrinking and salinizing, with restoration and lithium-geothermal development.

Sambhar Lake

Sambhar Lake (Shakambhari Jheel), Rajasthan's hypersaline wetland southwest of Jaipur, is India's largest inland salt lake, a Ramsar site producing about 9% of India's salt and a major flamingo wintering ground now shrinking from groundwater over-extraction.

Sarygamysh

Sarygamysh (Sarykamysh) Lake, a large brackish lake on the Turkmenistan-Uzbekistan border between the Caspian and Aral seas, formed since the 1960s from Amu Darya irrigation drainage water, over 3,000 km2, salinity about 11 g/l.

Sasykkol

Sasykkol (Сасықкөл), a large shallow freshwater lake in the Balkhash-Alakol basin of southeastern Kazakhstan, fed by the Tentek River and drained to Alakol via Koshkarkol; 736 km², max depth 4.7 m, part of Ramsar site 1892.

Sea of Galilee (יָם כִּנֶּרֶת)

Sea of Galilee (Yam Kinneret, Lake Tiberias, Lake Kinneret), Israel's largest freshwater lake in the Jordan Rift Valley, fed by the Jordan River, historically the source of the National Water Carrier and since 2025 refilled with desalinated water.

Sebago Lake

Sebago Lake, also called Big Sebago, is Maine's deepest and second-largest lake in Cumberland County, a glacial water supply for over 200,000 in Greater Portland with a filtration exemption, landlocked salmon fishery, and Sebago Lake State Park.

Sebkhet Sidi Elhani

Sebkhet Sidi Elhani (Sebkha Sidi El Hani) is a 36,000 ha intermittently flooded salt lake, or sebkha, in Tunisia's Sahel between Sousse and Mahdia; Ramsar site no. 2019 since 2012 and a BirdLife IBA important for greater flamingo and common crane.

Segozero

Segozero (Сегозеро, Segojärvi) is a 815 km² lake-reservoir in Karelia, Russia, converted to a reservoir in 1957 by a dam on the Segazha River; deep (103 m), cold, sparsely populated basin with 17 fish species and a large trout farm.

Seneca Lake (New York)

Seneca Lake is the largest and deepest of New York's 11 Finger Lakes, a glacial lake about 35 miles long and 200 m deep holding over half the region's water, feeding Geneva's drinking supply and a major wine trail.

Seven Lakes (Ҳафткӯл) (Tajikistan)

Seven Lakes (Ҳафткӯл, Haft Kul, Marguzor Lakes) is a chain of seven landslide-dammed mountain lakes in the Shing River gorge, Fann Mountains, near Penjikent, Tajikistan, rising from about 1,640 m to 2,400 m.

Shabogamo Lake

Shabogamo Lake, western Labrador, Newfoundland and Labrador, Canada; also spelled Shabogama (Algonquian, "water penetrates"). A 376 km² lake near Labrador City, downstream of Wabush Lake mine tailings, namesake of the Shabogamo Gabbro (~1375 Ma).

Siletiteniz

Siletiteniz (Seletyteniz, Силетытениз) is a shallow endorheic salt lake in North Kazakhstan Region, Kazakhstan, about 750–780 km² in area, 2 m mean depth, fed mainly by snowmelt from the Silety River.

Siling

Siling (色林错, Siling Co/Selin Co) is Tibet's largest lake, a brackish endorheic lake at ~4,530 m on the central Tibetan Plateau; it expanded ~40% since the 1970s and overflowed into Bam Co in September 2023.

Siljan

Siljan, lake in Dalarna, Sweden, seventh largest by area (293 km², max depth 134 m), largest lake in the Siljan Ring, Europe's largest meteorite impact structure, regulated since the 1920s, outlet to Dalälven at Leksand.