- Afrikaans: Oossee, Baltiese See
- Albanian: Deti Baltik m
- Amharic: ባልቲክ ባሕር (baltik baḥr)
- Arabic: بَحْر الْبَلْطِيق m (baḥr al-balṭīq)
- Hijazi Arabic: بحر البلطيق m (baḥr al-balṭīg, baḥr al-balṭīq)
- Armenian: Բալթիկ ծով (hy) (Baltʻik cov)
- Azerbaijani: Baltik dənizi (az)
- Basque: Itsaso Baltikoa, Baltiar Itsasoa
- Belarusian: Балты́йскае мо́ра n (Baltýjskaje móra), Ба́лтыка f (Báltyka)
- Bengali: বাল্টিক সাগর (balṭik śagor)
- Breton: Mor Baltel (br) m
- Bulgarian: Балти́йско море́ n (Baltíjsko moré)
- Burmese: ဘောလ်တစ် ပင်လယ် (bhaultac panglai)
- Carpathian Rusyn: Балтіцьке море n (Balticʹke more)
- Catalan: mar Bàltica f
- Chinese:
- Mandarin: 波羅的海／波罗的海 (zh) (Bōluódì-hǎi)
- Czech: Baltské moře (cs) n
- Danish: Østersøen (da) c
- Dutch: Baltische Zee f, Oostzee (nl) f
- Esperanto: Balta Maro
- Estonian: Läänemeri (et), Balti meri (obsolete)
- Farefare: Ateko Balti, Ateko Balt
- Faroese: Eystrasalt n
- Finnish: Itämeri (fi)
- French: mer Baltique (fr) f
- Galician: mar Báltico (gl) m
- Georgian: ბალტიის ზღვა (balṭiis zɣva)
- German: Ostsee (de) f, Baltisches Meer n
- Greek: Βαλτική Θάλασσα (el) (Valtikí Thálassa)
- Gujarati: બાલ્ટિક સાગર (bālṭik sāgar)
- Hebrew: הַיָּם הַבַּלְטִי m (ha-yam ha-baltik)
- Hindi: बाल्टिक सागर m (bālṭik sāgar)
- Hungarian: Balti-tenger (hu)
- Icelandic: Eystrasalt n, Austurmar m, Austmar (is) m, Austursjór m
- Ido: Baltika Maro (io)
- Indonesian: Laut Baltik
- Irish: Muir Bhailt f, An Bhailt f
- Italian: Mar Baltico m
- Japanese: バルト海 (ja) (バルトかい, Barutokai)
- Kannada: ಬಾಲ್ಟಿಕ್ ಸಮುದ್ರ (kn) (bālṭik samudra)
- Kashubian: Bôłt m, Wiôldżé Mòrze n
- Kazakh: Балтық теңізі (Baltyq teñızı)
- Khmer: សមុទ្ររបាល់ទិក (sɑɑmutrɔɔ-baltɨk)
- Korean: 발트해 (ko) (Balteuhae)
- Kurdish:
- Northern Kurdish: Derya Rojhelat, Deryaya Baltîk
- Kyrgyz: Балтика деңизи (Baltika deŋizi)
- Lao: ທະເລບານຕິກ (tha lē bān tik)
- Latin: Mare Balticum n
- Latvian: Baltijas jūra f
- Lithuanian: Baltijos jūra (lt) f
- Livonian: Vālda mer
- Low German:
- German Low German: Oostsee
- Macedonian: Балтичко Море n (Baltičko More)
- Malay: Laut Baltik
- Malayalam: ബാൾട്ടിക് കടൽ (bāḷṭṭikŭ kaṭal)
- Maltese: il-Baħar Baltiku m
- Manx: Yn Faarkey Baltagh m, Yn Vooir Valtagh f
- Maori: Moana Paratika
- Marathi: बाल्टिक समुद्र (bālṭik samudra)
- Mongolian:
- Cyrillic: Балтын тэнгис (Baltyn tengis)
- Nepali: बाल्टिक सागर (bālṭik sāgar)
- Norman: Mé Baltique f (Jersey)
- North Frisian: Ååstsiie
- Norwegian:
- Bokmål: Østersjøen (no) m
- Nynorsk: Austersjøen m
- Occitan: Mar Baltica f
- Old English: Ostsǣ m
- Old Norse: Eystrasalt n, Austmarr m
- Pashto: بالتیک بحیره f (bālṭik bahirá)
- Persian: دریای بالتیک (daryâ-ye bâltik)
- Polish: Morze Bałtyckie (pl) n, Bałtyk (pl) m
- Portuguese: Mar Báltico (pt) m
- Punjabi: ਬਾਲਟਿਕ ਸਮੁੰਦਰ m (bālṭik samundar)
- Romanian: Marea Baltică (ro) f
- Romansch: Mar da l'Ost f
- Russian: Балти́йское мо́ре (ru) n (Baltíjskoje móre), Ба́лтика (ru) f (Báltika)
- Scots: Baltic Sea
- Scottish Gaelic: Muir Baltach f
- Serbo-Croatian:
- Cyrillic: Ба̀лтичко̄ мо̑ре n
- Roman: Bàltičkō mȏre n
- Slovak: Baltské more (sk) n
- Slovene: Baltsko morje n
- Sorbian:
- Lower Sorbian: Baltiske mórjo
- Upper Sorbian: Baltiske morjo
- Spanish: mar Báltico (es) m
- Swedish: Östersjön (sv) c
- Tagalog: Dagat Baltiko
- Tajik: Баҳри Балтика (Bahr-i Baltika)
- Tamil: பால்டிக் கடல் (pālṭik kaṭal)
- Telugu: బాల్టిక్ సముద్రం (bālṭik samudraṁ)
- Thai: ทะเลบอลติก (tá-lee bon-dtìk)
- Turkish: Baltık Denizi (tr)
- Turkmen: Baltika deňzi
- Ukrainian: Балті́йське мо́ре n (Baltíjsʹke móre), Ба́лтика f (Báltyka)
- Urdu: بحیرہ بالٹک f (bahīrā bālṭik)
- Uyghur: بالتىق دېڭىزى (baltiq dë'ngizi)
- Uzbek: Boltiq dengizi
- Vietnamese: biển Ban Tích
- Võro: Õdagumeri
- Welsh: Y Môr Baltig m
- West Frisian: Eastsee
- Yiddish: באַלטישער ים m (baltisher yam)
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