- Country: Kazakhstan
- Population: 292,780
- Latitude: 50° 25.6' N (50.42675°)
- Longitude: 80° 16' E (80.26669°)
- Elevation: 211 m/692 ft. above sea level
- Time zone: Asia/Almaty (UTC +06:00); DST not observed
- Alternate names: PLX, Semei, Semeï, Semej, Semeja, Semejus, Semipalatinsk, Semipalatynsk, Σεμέι, Семеј, Семей, Семипалатинск, סמיי, سمی, سيماي, سیمی, سێمێی, セメイ, 塞米伊, 세메이
- Alternate names: PLX, Semei, Semej, Semeja, Semejus, Semey, Semeï, Semipalatinsk, Semipalatynsk, sai mi yi, semei, smy, smyy, symay, symy, Σεμέι, Семей, Семеј, Семипалатинск, סמיי, سمی, سيماي, سیمی, سێمێی, セメイ, 塞米伊, 세메이
Data by Geonames.org, CC-BY