| Name | Country | Feature class | Latitude | Longitude | |
|---|---|---|---|---|---|
3951  | Siyambalangamuwa | Sri Lanka, Sabaragamuwa Province Kegalle District > Rambukkana Division > Udanvita | locality | N 7° 22′ 43'' | E 80° 22′ 15'' |
| 3952 | Siyambalakatuwa | Sri Lanka, Southern Province Hambantota District > Ambalantota Division > Murawesihena | locality | N 6° 12′ 38'' | E 80° 55′ 19'' |
| 3953 | Siyambalakadawara | Sri Lanka, North Western Province Kurunegala District > Panduwasnuwara Division > Kadawalagedara | locality | N 7° 36′ 37'' | E 80° 8′ 27'' |
| 3954 | Siyambalagaswewa | Sri Lanka, North Central Province Anuradhapura District > Kahatagasdigiliya Divison > Gonumeruwewa | locality | N 8° 29′ 35'' | E 80° 41′ 36'' |
| 3955 | Siyambalagaswewa | Sri Lanka, North Central Province Anuradhapura District > Nuwaragam Palata Central Division > Helambagaswewa2 | locality | N 8° 29′ 51'' | E 80° 20′ 17'' |
| 3956 | Siyambalagaswewa | Sri Lanka, North Central Province Anuradhapura District > Rambewa Divison > Siyambalagaswewa | locality | N 8° 29′ 11'' | E 80° 28′ 44'' |
| 3957 | Siyambalagaswewa | Sri Lanka, North Central Province Anuradhapura District > Rambewa Divison > Medagama1 | locality | N 8° 27′ 50'' | E 80° 25′ 3'' |
| 3958 | Siyambalagaswewa | Sri Lanka, North Western Province Kurunegala District > Giribawa Division > Hettiarachchigama | locality | N 8° 5′ 50'' | E 80° 9′ 25'' |
| 3959 | Siyambalagaswewa | Sri Lanka, North Western Province Puttalam District > Anamaduwa Division > Thonigala | locality | N 7° 54′ 19'' | E 79° 57′ 21'' |
| 3960 | Siyambalagaswewa | Sri Lanka, North Western Province Kurunegala District > Kobeigane > Bamunugama2 | locality | N 7° 39′ 29'' | E 80° 9′ 51'' |
| 3961 | Siyambalagaskotuwa | Sri Lanka, North Western Province Kurunegala District > Kuliyapitiya East Division > Kotadeniyawa | locality | N 7° 30′ 20'' | E 80° 11′ 49'' |
| 3962 | Siwalapitiya | Sri Lanka, North Central Province Anuradhapura District > Mahavilachchiya Division > Dunumadalawa1 | locality | N 8° 23′ 48'' | E 80° 12′ 1'' |
| 3963 | Sittaraveli | Sri Lanka, North Western Province Puttalam District > Puttalam Division > Manalthivu | locality | N 8° 4′ 28'' | E 79° 51′ 42'' |
| 3964 | Sittamadama | Sri Lanka, North Western Province Puttalam District > Arachchikattuwa Division > Weerakumandaluwa | locality | N 7° 36′ 15'' | E 79° 48′ 56'' |
| 3965 | Sirikkulama | Sri Lanka, North Central Province Anuradhapura District > Ipalogama Division > Sangattewa | locality | N 8° 6′ 48'' | E 80° 29′ 14'' |
| 3966 | Siribila | Sri Lanka, Western Province Kalutara District > Dodangoda Division > Eladoowa | locality | N 6° 30′ 0'' | E 80° 3′ 0'' |
3967  | Seeppukulama Seeppukulama,Sippikkulam,Sippikulama,Sippukulama | Sri Lanka, North Central Province Anuradhapura District > Mihinthale > Seeppukulama | populated place | N 8° 22′ 49'' | E 80° 35′ 19'' |
| 3968 | Sinna Naga Villu | Sri Lanka, North Western Province Puttalam District > Vanathavillu Division > Serakkuliya | locality | N 8° 14′ 8'' | E 79° 49′ 53'' |
| 3969 | Chinna adampan Chinna adampan,Sinna-adampan,Sinnadampan | Sri Lanka, Northern Province Vavuniya District > Vavuniya North > Sinnadampan | populated place | N 9° 2′ 51'' | E 80° 33′ 21'' |
| 3970 | Sinhapitiya  Singhapitiya,Sinhapitiya | Sri Lanka, Central Province Kandy District > Uda Palata Division > Sinhapitiya North | populated place | N 7° 10′ 0'' | E 80° 33′ 0'' |
| 3971 | Sinhalagoda | Sri Lanka, Sabaragamuwa Province Ratnapura District > Ayagama Division > Sinhalagoda | locality | N 6° 40′ 48'' | E 80° 17′ 53'' |
| 3972 | Sinhala Etawirawewa | Sri Lanka, North Central Province Anuradhapura District > Kebitigollewa Division > Kiriketuwewa | locality | N 8° 38′ 39'' | E 80° 43′ 16'' |
| 3973 | Simaveli South | Sri Lanka, North Western Province Puttalam District > Puttalam Division > Marikkar Street | locality | N 8° 3′ 15'' | E 79° 50′ 44'' |
| 3974 | Silwatgama | Sri Lanka, North Western Province Kurunegala District > Panduwasnuwara Division > Pallegama | locality | N 7° 36′ 13'' | E 80° 2′ 56'' |
| 3975 | Silverdale | Sri Lanka, Western Province Kalutara District > Beruwala Division > Hirigalgodella | locality | N 6° 32′ 0'' | E 80° 1′ 0'' |
| 3976 | Silavatturai Silavatturai,Silavaturai,Silvatturai | Sri Lanka, Northern Province | populated place | N 8° 44′ 48'' | E 79° 56′ 52'' |
3977  | Sigiri Rock Sigiri Rock,Sigiriya | Sri Lanka, Central Province Matale District > Dambulla > Sigiriya | mountain elevation 363m | N 7° 57′ 25'' | E 80° 45′ 36'' |
| 3978 | Seththikulama | Sri Lanka, North Central Province Anuradhapura District > Ipalogama Division > Heenukwegama | locality | N 8° 6′ 40'' | E 80° 33′ 17'' |
| 3979 | Seruvila Seruvila,Seruvilla,Seruwawila | Sri Lanka, Eastern Province Trincomalee District > Seruvila > Seruvila | populated place | N 8° 22′ 6'' | E 81° 19′ 2'' |
| 3980 | Seruwawa | Sri Lanka, North Western Province Kurunegala District > Kurunegala Division > Seruwawa | locality | N 7° 35′ 29'' | E 80° 19′ 45'' |
| 3981 | Seruvila-Allai Sanctuary | Sri Lanka, Eastern Province | reserve | N 8° 22′ 0'' | E 81° 18′ 0'' |
| 3982 | Seruvila Allai Sanctuary | Sri Lanka, Eastern Province | reserve | N 8° 18′ 0'' | E 81° 21′ 0'' |
| 3983 | Serunewa | Sri Lanka, North Central Province Anuradhapura District > Horowupotana Division > Diyatittawewa | locality | N 8° 26′ 11'' | E 80° 55′ 55'' |
| 3984 | Serugolla | Sri Lanka, North Western Province Kurunegala District > Narammala Division > Embalapola | locality | N 7° 24′ 27'' | E 80° 15′ 21'' |
| 3985 | Sengamuwa | Sri Lanka, Eastern Province Ampara District > Pottuvil Division > Kalappukaddu | locality | N 6° 53′ 8'' | E 81° 46′ 12'' |
| 3986 | Sendiriyamulla | Sri Lanka, North Western Province Puttalam District > Dankotuwa Division > Sendiriyamulla | locality | N 7° 18′ 34'' | E 79° 56′ 11'' |
| 3987 | Senanayake Samudra Sanctuary | Sri Lanka, Uva Province | reserve | N 7° 13′ 0'' | E 81° 27′ 0'' |
| 3988 | Senanayaka Samudraya Sanctuary | Sri Lanka, Eastern Province | reserve | N 7° 9′ 37'' | E 81° 31′ 44'' |
| 3989 | Semewa | Sri Lanka, North Central Province Anuradhapura District > Medawachchiya Division > Moragoda1 | locality | N 8° 34′ 45'' | E 80° 34′ 48'' |
| 3990 | Sellankandal Forest Reserve | Sri Lanka, North Western Province | forest reserve | N 8° 1′ 51'' | E 79° 53′ 45'' |
| 3991 | Sellaka Oya Sanctuary | Sri Lanka, Eastern Province | reserve | N 7° 9′ 4'' | E 81° 32′ 21'' |
| 3992 | Sellaka Oya Sanctuary | Sri Lanka, Uva Province | reserve | N 7° 2′ 59'' | E 81° 31′ 33'' |
| 3993 | Seguwantivu | Sri Lanka, North Western Province Puttalam District > Puttalam Division > Manalthivu | locality | N 8° 4′ 48'' | E 79° 48′ 27'' |
| 3994 | Sanguthtattana Sangutatane,Sanguthtattana,Sangutthattane | Sri Lanka, North Western Province Puttalam District > Chilaw Division > Munneshwarama | populated place | N 7° 34′ 56'' | E 79° 48′ 40'' |
| 3995 | Sangilipalama Sangilipalam,Sangilipalama | Sri Lanka, Central Province Nuwara Eliya District > Kotmale Division > Rambodagama | populated place | N 7° 3′ 27'' | E 80° 40′ 57'' |
| 3996 | Sandichena | Sri Lanka, North Western Province Puttalam District > Mundel Division > Madurankuliya | locality | N 7° 54′ 26'' | E 79° 50′ 9'' |
| 3997 | Sampaturai Saint Pedro,Sampathurai,Sampaturai | Sri Lanka, Northern Province Mannar District > Mannar Town > Erukkalampiddy West | populated place | N 9° 3′ 0'' | E 79° 52′ 0'' |
| 3998 | Sambaltivu Champaitivu,Sambaltivu,Sampaltivu | Sri Lanka, Eastern Province Trincomalee District > Trincomalee Town and Gravets Division > Salli | populated place | N 8° 37′ 34'' | E 81° 12′ 45'' |
| 3999 | Sambukkulama Sambukkulam,Sambukkulama,Sambukulam | Sri Lanka, North Western Province Puttalam District > Kalpitiya Division > Ettala | populated place | N 8° 5′ 17'' | E 79° 43′ 30'' |
| 4000 | Salampakerny | Sri Lanka, Eastern Province Batticaloa District > Manmunai West > Vavunativu | locality | N 7° 40′ 58'' | E 81° 38′ 23'' |
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