| Name | Country | Feature class | Latitude | Longitude | |
|---|---|---|---|---|---|
251  | Southern Nomoneas Islands - Tonoas Island | Micronesia, Chuuk Tonoas Municipality | region population 3,910, elevation 344m | N 7° 22′ 51'' | E 151° 53′ 29'' |
| 252 | Northern Nomoneas Islands - Weno Island | Micronesia, Chuuk Weno Municipality | region population 13,802, elevation 368m | N 7° 26′ 24'' | E 151° 52′ 58'' |
| 253 | Pohnpei Lorikeet Breeding Area | Micronesia, Pohnpei State Kitti Municipality | region | N 6° 45′ 46'' | E 158° 0′ 36'' |
| 254 | Oksoritod - Houk Island Chuuk Northwestern Islands | Micronesia, Chuuk Houk Municipality | region | N 6° 40′ 58'' | E 149° 18′ 7'' |
| 255 | Pattiw - Houk Island Chuuk Western Islands | Micronesia, Chuuk Houk Municipality | region | N 6° 40′ 58'' | E 149° 18′ 10'' |
| 256 | Oksoritod - Puluwat Atoll Chuuk Northwestern Islands | Micronesia, Chuuk Polowat Municipality | region | N 7° 21′ 18'' | E 149° 11′ 2'' |
| 257 | Pattiw - Puluwat Atoll Chuuk Western Islands | Micronesia, Chuuk Polowat Municipality | region | N 7° 21′ 18'' | E 149° 11′ 6'' |
| 258 | Oksoritod - Pulap Atoll Chuuk Northwestern Islands | Micronesia, Chuuk Pollap Municipality | region | N 7° 34′ 30'' | E 149° 24′ 21'' |
| 259 | Pattiw - Pulap Atoll Chuuk Western Islands | Micronesia, Chuuk Pollap Municipality | region | N 7° 34′ 30'' | E 149° 24′ 25'' |
| 260 | Oksoritod - Namonuito Islands Chuuk Northwestern Islands | Micronesia, Chuuk Onoun Municipality | region population 1,341 | N 8° 43′ 30'' | E 150° 0′ 3'' |
| 261 | Oksoritod - East Fayu Island Chuuk Northwestern Islands | Micronesia, Chuuk Nomwin Municipality | region | N 8° 33′ 3'' | E 151° 20′ 24'' |
| 262 | Oksoritod - Hall Islands Chuuk Northwestern Islands | Micronesia, Chuuk | region | N 8° 34′ 48'' | E 151° 58′ 15'' |
| 263 | Oksoritod - Murilo Atoll Chuuk Northwestern Islands | Micronesia, Chuuk | region | N 8° 42′ 6'' | E 152° 14′ 8'' |
| 264 | Oksoritod - Nomwin Atoll Chuuk Northwestern Islands | Micronesia, Chuuk | region | N 8° 32′ 0'' | E 151° 47′ 3'' |
| 265 | NW Nauru Tectonic Basin | Micronesia, Kosrae | region | N 5° 19′ 30'' | E 162° 59′ 6'' |
| 266 | Green turtle Nesting Area | Micronesia, Chuuk Nomwin Municipality | region | N 8° 33′ 3'' | E 151° 20′ 27'' |
| 267 | Hall Islands - Namwin Atoll | Micronesia, Chuuk | region | N 8° 31′ 59'' | E 151° 47′ 10'' |
| 268 | Hall Islands - Murilo Atoll Pafeng | Micronesia, Chuuk | region | N 8° 42′ 6'' | E 152° 14′ 16'' |
| 269 | Fananu Municipality - Nomwin Atoll East Side | Micronesia, Chuuk Fananu Municipality | region | N 8° 33′ 29'' | E 151° 54′ 31'' |
| 270 | Turtle Islands - Turtle Lagoon | Micronesia, Yap State Ulithi Municipality | region | N 9° 55′ 19'' | E 139° 49′ 48'' |
| 271 | Turtle Islands - Zohhoiiyoru Bank | Micronesia, Yap State Ulithi Municipality | region | N 9° 56′ 56'' | E 139° 54′ 54'' |
| 272 | Philippine Sea Tectonic Plate - Yap Islands Filipino Plate | Micronesia, Yap State | region | N 9° 32′ 16'' | E 138° 6′ 3'' |
| 273 | Philippine Sea Tectonic Plate - Ngulu Atoll | Micronesia, Yap State Ngulu Municipality | region | N 8° 27′ 0'' | E 137° 29′ 9'' |
| 274 | Sea Turtle Hunting Grounds | Micronesia, Yap State Gaferut Municipality | region | N 9° 13′ 40'' | E 145° 23′ 5'' |
| 275 | Caroline Tectonic Plate - NorthWest Edge | Micronesia, Yap State Ulithi Municipality | region | N 9° 54′ 0'' | E 139° 36′ 10'' |
276  | Kapingamarangi Seamount Caroline-Solomon Ridge,East Caroline Plateau,Kapingamarangi Rise,Ontong Java Rise,Solomon Rise,Val K... | Micronesia, Pohnpei State Kapingamarangi Municipality | seamount | N 1° 4′ 1'' | E 154° 45′ 54'' |
| 277 | Ianthe Reefs Banc Ianthe,Ianthe Shoal,Janthe Shoal,Yangi-Shu,Yanjii Shu,Yanthe Shoal | Micronesia, Yap State Elato Municipality | tablemount (or guyot) | N 5° 56′ 23'' | E 145° 19′ 52'' |
278  | Dolen Merewi Dol Merewi,Dollen Merewi,Dolmerewi,Tolemarawai,Tolemarawi,Toremaraui Mountain,Toremaraui-san | Micronesia, Pohnpei State Madolenihm Municipality | peak elevation 245m | N 6° 52′ 59'' | E 158° 16′ 8'' |
279  | Oumoar Aumar,Aumaru,Aumoar,Oarmoar,Oaumoar,Oaunoar | Micronesia, Pohnpei State Sokehs Municipality | populated place elevation 4m | N 6° 56′ 15'' | E 158° 10′ 22'' |
| 280 | Wininen Binilen,Uchida To,Uchida-shima,Udidan Island,Ulilen,Winimor | Micronesia, Chuuk Uman-Fonuweisom Municipality | island elevation 4m | N 7° 10′ 20'' | E 151° 57′ 5'' |
| 281 | Winifouno Djukusamau,Farther Rock Place,Sakaki To,Vinifoula,Winifewuno,Winifourer | Micronesia, Chuuk Fefen Municipality | hill elevation 201m | N 7° 19′ 53'' | E 151° 50′ 40'' |
| 282 | Winifirer Cape Sabuk,Sand Island,Sand Islet,Shark Island,Winipirea | Micronesia, Chuuk Fonoton Municipality | islet elevation 1m | N 7° 29′ 49'' | E 151° 54′ 23'' |
| 283 | West Fayu Atoll  Nishi,Piagailoe,Pigelao,Pigeloa,West Fayu | Micronesia, Yap State Satawal Municipality | atoll(s) elevation 3m | N 8° 4′ 22'' | E 146° 42′ 39'' |
| 284 | Weltot Uerunijato,Weey,Weltot Island,Weniot,Weniot Island | Micronesia, Chuuk Piherarh Municipality | islet | N 8° 36′ 32'' | E 150° 22′ 56'' |
| 285 | Wat Uato,Ulat,Wahd Island,Wasshedazei,Wat Island,Wato-To | Micronesia, Pohnpei State Sapwuahfik Municipality | island | N 5° 47′ 9'' | E 157° 20′ 39'' |
| 286 | Urak Aoura,Uhrek,Upen,Urak Island,Uraku-to,Uraku-tō | Micronesia, Pohnpei State Mokil Municipality | island | N 6° 39′ 49'' | E 159° 45′ 0'' |
| 287 | Uput Notu-To,Notu-Tō,Obut,Ubut,Uola Road,Uput | Micronesia, Chuuk Uman-Fonuweisom Municipality | islet elevation 3m | N 7° 13′ 24'' | E 151° 59′ 47'' |
| 288 | Unimokur Mount Urimoguru,Unimock,Urimoguru,Winimekur,Winimékúr | Micronesia, Chuuk Tonoas Municipality | hill elevation 116m | N 7° 22′ 39'' | E 151° 53′ 50'' |
| 289 | Unimas Mount Uinku,Peilas,Pweyinap,Uikku-San,Unikopos | Micronesia, Chuuk Tonoas Municipality | hill elevation 62m | N 7° 21′ 25'' | E 151° 53′ 14'' |
| 290 | Unufoucho Berg Adeamer Peak,Berg Faumig,Berg Mt Adeamer,Uneior,Unufoucho | Micronesia, Chuuk Paata-Tupunion Municipality | hill elevation 174m | N 7° 22′ 27'' | E 151° 35′ 11'' |
| 291 | Unanu Onari Islet,Umang | Micronesia, Chuuk Unanu Municipality | island population 178 | N 8° 45′ 0'' | E 150° 20′ 24'' |
| 292 | Uman Island CENTIMETER WW2,Euyu-Shima,Fuyu Shima - Winter Island,Olor,Uman Island,Wuumaan | Micronesia, Chuuk Uman-Fonuweisom Municipality | island population 2,847, elevation 282m | N 7° 17′ 56'' | E 151° 52′ 39'' |
| 293 | Mount Teroken Chukomong,Mount Teroken,Teroken-Berg,Tolop,Tonokken,Top of Weno Island | Micronesia, Chuuk Weno Municipality | mountain elevation 368m | N 7° 26′ 17'' | E 151° 51′ 6'' |
| 294 | Tonga Kerikeri Deungagelegele,Deungakerekere,Onaf,Te unaa-kelekele,Teungakerekere,To unga gereger,Tonga Kerikeri Is... | Micronesia, Pohnpei State Nukuoro Municipality | islet | N 3° 52′ 3'' | E 154° 55′ 32'' |
| 295 | Tol Island Faituk,PORTFOLIO WW2,Suiyo-to,Suiyō-tō,Tokolara,Tol Island,Ton,Wednesday Island | Micronesia, Chuuk Tolensom Municipality | island elevation 446m | N 7° 19′ 58'' | E 151° 37′ 24'' |
| 296 | Toas Ta,Tauas,Tewaahs,Toas Islet,Toass,Toasu | Micronesia, Yap State Elato Municipality | islet elevation 2m | N 7° 24′ 48'' | E 146° 10′ 11'' |
| 297 | To Tither,To Island,Tsu,Tsuu,Tsuu To,Tsuū | Micronesia, Chuuk Polowat Municipality | islet | N 7° 22′ 2'' | E 149° 11′ 18'' |
| 298 | Tamatam Molaluk,Runalin,Tamatam Island,Tamatama-to,Tamatama-tō,Tametam | Micronesia, Chuuk Tamatam Municipality | island population 365 | N 7° 32′ 18'' | E 149° 24′ 36'' |
| 299 | Dagamanga Dakamanga,Otaha mana,Takonran Island,Takonran-to,Takonran-tō,Takonrau,Tokonrau | Micronesia, Pohnpei State Nukuoro Municipality | island | N 3° 50′ 49'' | E 154° 58′ 24'' |
| 300 | Tagaulap Tagairappu,Tagairappu-to,Tagairappu-tō,Tagoilap,Tegailap,Tohoilap | Micronesia, Yap State Woleai Municipality | island | N 7° 21′ 29'' | E 143° 52′ 33'' |
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