| 江海区 | Jiāng hǎi qū | Jianghai district of Jiangmen city 江门市, Guangdong |
| 河清海晏 | hé qīng hǎi yàn | the Yellow River is clear and the sea is calm; the world is at peace (idiom) |
| 沿海地区 | yán hǎi dì qū | coastland; coastal areas |
| 沿海州 | yán hǎi zhōu | coastal region; refers to Russian far east Primorsky Krai |
| 法海 | Fǎ hǎi | Fahai, name of the evil Buddhist monk in Tale of the White Snake 白蛇傳 |
| 波弗特海 | Bō fú tè hǎi | Beaufort sea (off Alaska and British Columbia) |
| 波斯普鲁斯海峡 | bō sī pǔ lǔ sī hǎi xiá | the Bosphorus (strait) |
| 泥牛入海 | ní niú rù hǎi | lit. a clay ox enters the sea (idiom); fig. to disappear with no hope of returning |
| 洱海 | Ěr hǎi | Erhai Lake |
| 流亡在海外 | liú wáng zài hǎi wài | to be in exile overseas |
| 浩如烟海 | hào rú yān hǎi | vast as the open sea (idiom); fig. extensive (library) |
| 海上奇书 | hǎi shàng qí shū | literary journal published in 1892-93 by Han Bangqing 韩邦庆 featuring serialized novels in classical Chinese and Jiangsu vernacular |
| 海上运动 | hǎi shàng yùn dòng | water sports (sailing, windsurfing etc) |
| 海事局 | hǎi shì jú | PRC Maritime Safety Agency |
| 海事法院 | hǎi shì fǎ yuàn | maritime court |
| 海事处 | hǎi shì chù | Marine Department |
| 海于格松 | Hǎi yú gé sōng | Haugesund (city in Rogaland, Norway) |
| 海伯利 | Hǎi bó lì | Highbury (name) |
| 海信 | Hǎi xìn | Hisense (brand) |
| 海伦 | Hǎi lún | Hailun county level city in Suihua 绥化, Heilongjiang; Helen or Hélène (name) |
| 海伦・凯勒 | Hǎi lún · Kǎi lē | Helen Keller (1880-1968), famous American deaf-blind author and activist (whose story is told in biopic The Miracle Worker) |
| 海伦市 | Hǎi lún shì | Hailun county level city in Suihua 绥化, Heilongjiang |
| 海兔 | hǎi tù | sea hare (Aplysia) |
| 海内外 | hǎi nèi wài | domestic and international; at home and abroad |
海内存知己，
天涯若比邻 | hǎi nèi cún zhī jǐ ,
tiān yá ruò bǐ lín | close friend in a distant land, far-flung realms as next door (idiom); close in spirit although far away; absence makes the heart grow fonder |
| 海刺芹 | hǎi cì qín | sea holly (Eryngium maritimum) |
| 海勃湾 | Hǎi bó wān | Haibowan district of Wuhait city 乌海市, Inner Mongolia |
| 海勃湾区 | Hǎi bó wān qū | Haibowan district of Wuhait city 乌海市, Inner Mongolia |
| 海北州 | Hǎi běi zhōu | Haibei Tibetan autonomous prefecture in Qinghai |
| 海北藏族自治州 | Hǎi běi Zàng zú zì zhì zhōu | Haibei Tibetan autonomous prefecture (Tibetan: Mtsho-byang Bod-rigs rang-skyong-khul) in Qinghai |
| 海协会 | hǎi xié huì | (abbr.) ARATS, PRC Association for Relations Across the Taiwan Straits |
| 海南区 | Hǎi nán qū | Hainan district of Wuhait city 乌海市, Inner Mongolia |
| 海南大学 | Hǎi nán dà xué | Hainan University |
| 海南州 | Hǎi nán zhōu | see 海南藏族自治州 |
| 海南省 | Hǎi nán Shěng | Hainan Province, in South China Sea, abbr. 琼, capital Haikou 海口 |
| 海南藏族自治州 | Hǎi nán Zàng zú Zì zhì zhōu | Hainan Tibetan autonomous prefecture (Tibetan Mtsho-lho Bod-rigs rang-skyong-khul), Qinghai |
| 海印寺 | Hǎi yìn sì | Haeinsa in South Gyeongsang province of South Korea, the repository of Tripitaka Koreana 高丽大藏经, a World Heritage site |
| 海原 | Hǎi yuán | Haiyuan county in Zhongwei 中卫, Ningxia |
| 海原县 | Hǎi yuán xiàn | Haiyuan county in Zhongwei 中卫, Ningxia |
| 海参崴 | Hǎi shēn wǎi | Vladivostok; Ming and Qing name for Vladivostok 符拉迪沃斯托克 and the province around it |
| 海口市 | Hǎi kǒu Shì | Haikou prefecture-level city and capital of Hainan Province 海南省 |
| 海啸 | hǎi xiào | tsunami |
| 海地岛 | Hǎi dì dǎo | Hispaniola (Caribbean Island divided between Dominican Republic and Haiti) |
| 海城 | Hǎi chéng | Haicheng county level city in Anshan 鞍山, Liaoning |
| 海城区 | Hǎi chéng qū | Haicheng district of Beihai city 北海市, Guangxi |
| 海城市 | Hǎi chéng shì | Haicheng county level city in Anshan 鞍山, Liaoning |
| 海基会 | hǎi jī huì | (abbr.) SEF, Taiwanese Strait Exchange Foundation |
| 海报 | hǎi bào | poster; playbill; notice |
| 海涂 | hǎi tú | tidal marsh; shoal; shallows |
| 海涂围垦 | hǎi tú wéi kěn | polder |
