| Name | Country | Feature class | Latitude | Longitude | |
|---|---|---|---|---|---|
1951  | Sitet | Kenya, Baringo | area | N 0° 11′ 0'' | E 35° 59′ 0'' |
| 1952 | Sirrken | Kenya, Baringo | locality | N 0° 12′ 7'' | E 36° 7′ 38'' |
| 1953 | Siongiroi | Kenya, Bomet County | locality | S 0° 56′ 20'' | E 35° 12′ 24'' |
| 1954 | Siobiliwa | Kenya, Kitui County | area | S 1° 11′ 11'' | E 38° 32′ 37'' |
| 1955 | Sinon Sinon | Kenya, Samburu County | locality | N 2° 6′ 48'' | E 36° 50′ 7'' |
| 1956 | Sinedet | Kenya, Nakuru County | area | S 0° 10′ 0'' | E 35° 42′ 0'' |
| 1957 | Simisi | Kenya, Kitui County | area | S 2° 3′ 0'' | E 38° 21′ 0'' |
| 1958 | Simisi | Kenya, Kitui County | locality | S 1° 58′ 8'' | E 38° 15′ 33'' |
| 1959 | Similani | Kenya, Mombasa County | area | S 4° 6′ 53'' | E 39° 39′ 45'' |
| 1960 | Simbol | Kenya, West Pokot County | locality | N 1° 34′ 12'' | E 35° 34′ 18'' |
| 1961 | Silip | Kenya, West Pokot County | locality | N 1° 41′ 55'' | E 35° 27′ 15'' |
| 1962 | Siliga | Kenya, Wajir County | locality | N 1° 40′ 47'' | E 40° 17′ 24'' |
| 1963 | Sikwata | Kenya, Kitui County | locality | S 1° 52′ 43'' | E 38° 25′ 21'' |
| 1964 | Sigisokatima | Kenya, Marsabit County | locality | N 3° 11′ 2'' | E 38° 20′ 39'' |
| 1965 | Shirango | Kenya, Kilifi County | locality | S 3° 28′ 20'' | E 39° 16′ 33'' |
| 1966 | Shiraha | Kenya, Kakamega County | locality | N 0° 11′ 23'' | E 34° 34′ 52'' |
| 1967 | Shimbirr Faduma | Kenya, Mandera County | area | N 3° 2′ 4'' | E 40° 31′ 22'' |
| 1968 | Shimanzali | Kenya, Lamu | locality | S 2° 11′ 16'' | E 40° 50′ 9'' |
| 1969 | Shilishili | Kenya, Kajiado County | locality | S 2° 34′ 41'' | E 37° 35′ 27'' |
| 1970 | Shidelewa | Kenya, Busia County | area | N 0° 30′ 0'' | E 34° 15′ 0'' |
| 1971 | Sheshe | Kenya, Lamu | locality | S 2° 19′ 16'' | E 40° 39′ 58'' |
| 1972 | Shauri Moyo | Kenya, Lamu | locality | S 2° 24′ 3'' | E 40° 41′ 31'' |
| 1973 | Shariani | Kenya, Kilifi County | locality | S 3° 46′ 17'' | E 39° 49′ 54'' |
| 1974 | Shanamu | Kenya, Kajiado County | locality | S 1° 39′ 11'' | E 36° 21′ 56'' |
| 1975 | Shamu | Kenya, Kwale County | area | S 4° 18′ 19'' | E 39° 31′ 57'' |
| 1976 | Shakajila | Kenya, Kilifi County | locality | S 3° 5′ 16'' | E 39° 29′ 26'' |
| 1977 | Shakadulo | Kenya, Kilifi County | locality | S 3° 2′ 36'' | E 39° 51′ 57'' |
| 1978 | Sesia | Kenya, Samburu County | locality | N 0° 51′ 5'' | E 37° 9′ 33'' |
| 1979 | Sertonji | Kenya, Baringo | locality | N 0° 3′ 54'' | E 36° 3′ 17'' |
| 1980 | Serolevi | Kenya, Samburu County | locality | N 1° 2′ 16'' | E 36° 56′ 55'' |
| 1981 | Sengani | Kenya, Machakos County | area | S 1° 13′ 35'' | E 37° 18′ 2'' |
| 1982 | Sempeweti | Kenya, Kajiado County | area | S 2° 27′ 0'' | E 36° 51′ 0'' |
| 1983 | Semi | Kenya, Taita Taveta | locality | S 3° 52′ 16'' | E 38° 35′ 6'' |
| 1984 | Selini | Kenya, Lamu | locality | S 2° 4′ 44'' | E 40° 44′ 48'' |
| 1985 | Selelio Selelio | Kenya, Marsabit County | locality | N 2° 56′ 8'' | E 39° 4′ 50'' |
| 1986 | Seketet | Kenya, Samburu County | area | N 1° 14′ 0'' | E 36° 36′ 0'' |
| 1987 | Segemik | Kenya, Bomet County | locality | S 0° 50′ 39'' | E 35° 14′ 11'' |
| 1988 | Segel | Kenya, Marsabit County | area | N 2° 31′ 45'' | E 37° 53′ 9'' |
| 1989 | Saula | Kenya, West Pokot County | area | N 1° 42′ 0'' | E 35° 24′ 0'' |
| 1990 | Satamesa | Kenya, Marsabit County | locality | N 3° 1′ 9'' | E 38° 33′ 20'' |
| 1991 | Sasuri | Kenya, Bungoma County | area | N 0° 49′ 0'' | E 34° 29′ 0'' |
| 1992 | Saseni | Kenya, Kajiado County | locality | S 3° 8′ 17'' | E 37° 42′ 23'' |
| 1993 | Sarego | Kenya, Mandera County | area | N 3° 39′ 27'' | E 41° 23′ 7'' |
| 1994 | Sapo | Kenya, Kwale County | area | S 4° 10′ 38'' | E 39° 13′ 5'' |
| 1995 | Saoset | Kenya, Bomet County | locality | S 0° 47′ 53'' | E 35° 25′ 28'' |
| 1996 | Sankuri | Kenya, Lamu | locality | S 1° 43′ 0'' | E 41° 22′ 19'' |
| 1997 | Sankuri | Kenya, Garissa County | locality | S 0° 17′ 3'' | E 39° 36′ 21'' |
| 1998 | Sangoleaku | Kenya, Garissa County | area | S 0° 33′ 11'' | E 40° 52′ 15'' |
| 1999 | Sangayaya | Kenya, Kitui County | locality | S 2° 53′ 40'' | E 38° 49′ 44'' |
| 2000 | Sanadi | Kenya, Isiolo County | area | N 0° 34′ 0'' | E 38° 48′ 0'' |
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