- Country: Russia
- Population: 176,484
- Latitude: 46° 57.24' N (46.95407°)
- Longitude: 142° 44.16' E (142.73603°)
- Elevation: 48 m/157 ft. above sea level
- Time zone: Asia/Sakhalin (UTC +11:00); DST not observed
- Alternate names: Ioujno-Sakhalinsk, Iujno-Sahalinsk, Iujno-Sakhalinsk, Joezjno-Sachalinsk, Juĵno-Saĥalinsk, Juschno-Sachalinsk, Juzhno-Sakhalinsk, Juzjno-Sachalinsk, Juzjno-Sakhalinsk, Južno Sachalinskas, Južno-Sachalinsk, Južno-Sahalinsk, Južno-Sahhalinsk, Jużnosachalińsk, Južnosahaļinska, Juzsno-Szahalinszk, Suvisahalinsk, Toëkhara, Toyohara, Toyokhara, Urajimirofuka, UUS, Yujno-Sahalinsk, Yujno-Saxalinsk, Yuzhno-Sajalinsk, Јужно-Сахалинск, Горад Южна-Сахалінск, Южно-Сахалінськ, Южно-Сахалинск, Южносахалинск, יוזנו-סחלינסק, يوجنو-ساخالينسك, یوژنو-ساخالینسک, یوژنو-سخالنسک, یوژنوسخالینسک, युझ्नो-साखालिन्स्क, ユジノサハリンスク, 南萨哈林斯克, 유즈노사할린스크
- Alternate names: Gorad Juzhna-Sakhalinsk, Ioujno-Sakhalinsk, Iujno-Sahalinsk, Iujno-Sakhalinsk, Joezjno-Sachalinsk, Jujno-Sahalinsk, Juschno-Sachalinsk, Juzhno-Sakhalins'k, Juzhno-Sakhalinsk, Juzhnosakhalinsk, Juzjno-Sachalinsk, Juzjno-Sakhalinsk, Juzno Sachalinskas, Juzn
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