| Name | Country | Feature class | Latitude | Longitude | |
|---|---|---|---|---|---|
3101  | Owatura | Sri Lanka, Sabaragamuwa Province Ratnapura District > Weligepola Division > Handagiriya | locality | N 6° 35′ 7'' | E 80° 46′ 26'' |
| 3102 | Owatta | Sri Lanka, Sabaragamuwa Province Kegalle District > Rambukkana Division > Yodhagama1 | locality | N 7° 17′ 57'' | E 80° 23′ 11'' |
3103  | Ottappuwa Ottappuwa,Ottappuwe,Ottapuwe Galatabendiwewa | Sri Lanka, North Central Province Anuradhapura District > Nochchiyagama Division > Ottappuwa | populated place | N 8° 11′ 25'' | E 80° 15′ 40'' |
| 3104 | Otarawadiya Upper Otaravadiya,Otarawadiya,Otarawadiya Upper | Sri Lanka, Western Province Gampaha District > Divulapitiya Division > Bolagala | populated place | N 7° 16′ 28'' | E 79° 55′ 58'' |
| 3105 | Oonanagalawatta Oonanagalawatta,Oonanagalla,Oonoonagala | Sri Lanka, Central Province Kandy District > Panwila Division > Madulkele | populated place | N 7° 23′ 52'' | E 80° 43′ 16'' |
| 3106 | Omatta | Sri Lanka, Western Province Kalutara District > Agalawatta Division > Omatta | locality | N 6° 33′ 51'' | E 80° 11′ 0'' |
| 3107 | Olupeliyawa | Sri Lanka, North Western Province Kurunegala District > Kurunegala Division > Madithiyawala | locality | N 7° 26′ 41'' | E 80° 20′ 11'' |
| 3108 | Olumadu | Sri Lanka, Northern Province Vavuniya District > Venkalacheddikulam Division > Cheddikulam | locality | N 8° 39′ 37'' | E 80° 19′ 23'' |
| 3109 | Olukaranda | Sri Lanka, North Central Province Anuradhapura District > Kekirawa Division > Railway Town2 | locality | N 8° 4′ 27'' | E 80° 35′ 43'' |
| 3110 | Olugaskada | Sri Lanka, North Central Province Anuradhapura District > Kebitigollewa Division > Herathhalmillewa | locality | N 8° 43′ 33'' | E 80° 46′ 0'' |
| 3111 | Olugaskada | Sri Lanka, North Central Province Anuradhapura District > Horowupotana Division > Nanumillawewa | locality | N 8° 31′ 31'' | E 80° 49′ 17'' |
| 3112 | Olobbawa | Sri Lanka, North Central Province Anuradhapura District > Kekirawa Division > Olombewa | locality | N 8° 0′ 27'' | E 80° 35′ 23'' |
| 3113 | Oliyagankele Forest Reserve | Sri Lanka, Southern Province | forest reserve | N 6° 5′ 0'' | E 80° 31′ 0'' |
| 3114 | Olitenna | Sri Lanka, Sabaragamuwa Province Ratnapura District > Imbulpe Division > Muttettuwegama | locality | N 6° 42′ 30'' | E 80° 47′ 19'' |
| 3115 | Olaittoduvai Olaithoduvai,Olaittoduvai,Olaittoduvl | Sri Lanka, Northern Province Mannar District > Mannar Town > Olaithoduwai | populated place | N 9° 2′ 0'' | E 79° 50′ 0'' |
| 3116 | Olagama | Sri Lanka, Sabaragamuwa Province Kegalle District > Kegalla Division > Ranwala | locality | N 7° 15′ 21'' | E 80° 20′ 3'' |
| 3117 | Olabedda Forest Reserve | Sri Lanka, Southern Province | forest reserve | N 6° 13′ 0'' | E 80° 8′ 0'' |
| 3118 | Okawela Okawala,Okawela,Okewela,Okewelagoda | Sri Lanka, Southern Province Hambantota District > Okawela Division > Okewela | populated place | N 6° 6′ 24'' | E 80° 42′ 54'' |
| 3119 | Obokka | Sri Lanka, Sabaragamuwa Province Ratnapura District > Kalawana Division > Wembiyagoda | locality | N 6° 31′ 13'' | E 80° 24′ 7'' |
| 3120 | Obbegoda Lachesis,Obbegoda,Obbekota | Sri Lanka, Uva Province Moneragala District > Madulla Division > Obbegoda | populated place | N 6° 55′ 27'' | E 81° 20′ 57'' |
| 3121 | Nuwaragala Forest Reserve | Sri Lanka, Eastern Province | forest reserve | N 7° 29′ 16'' | E 81° 26′ 57'' |
| 3122 | Nungala | Sri Lanka, Southern Province Galle District > Ambalangoda > Metiwala | locality | N 6° 10′ 49'' | E 80° 5′ 31'' |
| 3123 | Nugatota | Sri Lanka, Central Province Nuwara Eliya District > Kotmale Division > Kalapitiya East | locality | N 7° 3′ 2'' | E 80° 39′ 1'' |
| 3124 | Nugagahawetiya | Sri Lanka, North Western Province Puttalam District > Anamaduwa Division > Thonigala | locality | N 7° 54′ 28'' | E 79° 56′ 56'' |
| 3125 | Nugadanda Pahalagama Nugadanda,Nugadanda Pahalagama,Nugadande Pahalagama | Sri Lanka, Sabaragamuwa Province Ratnapura District > Eheliyagoda > Karandana South | populated place | N 6° 46′ 19'' | E 80° 13′ 30'' |
| 3126 | Nochchiyagama | Sri Lanka, North Western Province Kurunegala District > Giribawa Division > Aliyawetunuwewa | locality | N 8° 3′ 32'' | E 80° 13′ 20'' |
| 3127 | Nochchimunai | Sri Lanka, Northern Province Kilinochchi District > Poonakary Division > Kariyalainagapaduvan | locality | N 9° 17′ 8'' | E 80° 7′ 0'' |
| 3128 | Nochchimoddai | Sri Lanka, Northern Province Vavuniya District > Vavuniya > Nochchimoddai | locality | N 8° 49′ 25'' | E 80° 30′ 0'' |
| 3129 | Nochohikundu Nochchikkundu,Nochchikundu,Nochohikundu | Sri Lanka, North Western Province Puttalam District > Kalpitiya Division > Andankanniya | populated place | N 8° 4′ 13'' | E 79° 43′ 49'' |
| 3130 | Nochchikulam Nochchikkulama,Nochchikulam,Nochchikulama | Sri Lanka, Northern Province Vavuniya District > Vavuniya South Division > Avusathapitiya | populated place | N 8° 41′ 48'' | E 80° 26′ 53'' |
| 3131 | Nochchikulam Nochchikkulama,Nochchikulam,Nochchikulama | Sri Lanka, Northern Province Vavuniya District > Vavuniya South Division > Kalukunnammaduwa | populated place | N 8° 40′ 45'' | E 80° 29′ 3'' |
| 3132 | Niyangama | Sri Lanka, Central Province Kandy District > Doluwa Division > Inguruwatta | locality | N 7° 10′ 25'' | E 80° 35′ 35'' |
| 3133 | Niyadandupola Niyadandupola,Niyadurupola,Niyandurupola | Sri Lanka, Sabaragamuwa Province Kegalle District > Warakapola Division > Weragoda3 | populated place | N 7° 9′ 59'' | E 80° 13′ 8'' |
| 3134 | Nivithigala Nivithigala,Nivitigala,Niwitigala | Sri Lanka, Sabaragamuwa Province Ratnapura District > Nivithigala Division > Pathakada | populated place | N 6° 36′ 33'' | E 80° 25′ 6'' |
| 3135 | Nivil | Sri Lanka, Northern Province Kilinochchi District > Karachchi Division > Urithirapuram North | locality | N 9° 26′ 2'' | E 80° 18′ 30'' |
| 3136 | Nitullagahapitiya | Sri Lanka, North Western Province Kurunegala District > Kuliyapitiya East Division > Kekunagolla | locality | N 7° 30′ 20'' | E 80° 9′ 45'' |
| 3137 | Nitulagama | Sri Lanka, North Central Province Anuradhapura District > Nochchiyagama Division > Kusumpura | locality | N 8° 16′ 55'' | E 80° 13′ 6'' |
| 3138 | Nitulgallewa Nitugallewa,Nitulgallewa,Nitulgollewa | Sri Lanka, North Central Province Anuradhapura District > Galenbidunuwewa > Janasirigama | populated place | N 8° 16′ 5'' | E 80° 46′ 41'' |
| 3139 | Nittamaluwa | Sri Lanka, Sabaragamuwa Province Ratnapura District > Imbulpe Division > Nittamaluwa | locality | N 6° 44′ 3'' | E 80° 51′ 6'' |
| 3140 | Nirveli North Neerveli,Nirveli,Nirveli North | Sri Lanka, Northern Province Jaffna District > Valikamam East > Neervely South | populated place | N 9° 43′ 0'' | E 80° 5′ 0'' |
| 3141 | Niriella | Sri Lanka, Sabaragamuwa Province Ratnapura District > Elapatha Division > Digana | locality | N 6° 37′ 4'' | E 80° 22′ 5'' |
| 3142 | Nilobe | Sri Lanka, Eastern Province Ampara District > Mahaoya Division > Kelavinna | locality | N 7° 30′ 18'' | E 81° 22′ 51'' |
| 3143 | Nellumalewatta Nagawatte,Nellumalewatta,Nilloomally,Nillumally | Sri Lanka, Central Province Kandy District > Panwila Division > Kelebokka | populated place | N 7° 26′ 15'' | E 80° 43′ 39'' |
| 3144 | Nillambe | Sri Lanka, Central Province Kandy District > Doluwa Division > Masgolla | locality | N 7° 9′ 4'' | E 80° 38′ 30'' |
| 3145 | Nillathgama Nillagama,Nillaggama,Nillathgama | Sri Lanka, North Western Province Kurunegala District > Galgamuwa Division > Bulnewa1 | populated place | N 7° 59′ 34'' | E 80° 19′ 46'' |
| 3146 | Nilgala | Sri Lanka, Uva Province Moneragala District > Bibile Division > Bulupitiya | locality | N 7° 11′ 33'' | E 81° 22′ 33'' |
3147  | Nilappannikkanmalai Nilapanikkan Malai,Nilappannikkanmalai | Sri Lanka, Eastern Province Trincomalee District > Gomarankadawela Division > Mailawewa | hill | N 8° 49′ 20'' | E 80° 58′ 40'' |
| 3148 | Nilagirimahasaya | Sri Lanka, Eastern Province Ampara District > Lahugala Division > Perani Lahugala | locality | N 6° 51′ 4'' | E 81° 41′ 57'' |
| 3149 | Nikawewa | Sri Lanka, North Central Province Anuradhapura District > Horowupotana Division > Rasnakawewa | locality | N 8° 34′ 20'' | E 80° 43′ 57'' |
| 3150 | Nikawewa | Sri Lanka, North Central Province Anuradhapura District > Kebitigollewa Division > Wattewewa | locality | N 8° 33′ 32'' | E 80° 40′ 50'' |
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