| Official Name: | Altai |
| Native Name: | Алтай |
| Pushpin Map: | Kazakhstan |
| Pushpin Label Position: | bottom |
| Pushpin Mapsize: | 280 |
| Pushpin Map Caption: | Location in Kazakhstan |
| Subdivision Type: | Country |
| Established Title: | Founded |
| Established Date: | 1791 |
| Established Title1: | Incorporated (city) |
| Established Date1: | 1941 |
| Leader Title: | Akim (mayor) |
| Population As Of: | 2009 |
| Population Total: | 39320 |
| Utc Offset: | +6 |
| Coordinates: | 49.7386°N 84.2719°W |
| Postal Code: | F42**** |
| Area Code: | +7 72335 |
Altai (Kazakh: Алтай|translit=Altai, Russian: Алтай|translit=Altai), until 2019 known as Zyryan (Kazakh: Зырян, Zyrian) or Zyryanovsk (Russian: Зыряновск) is a town of regional significance in East Kazakhstan Region of Kazakhstan, and the administrative center of the Altai District. It was established in 1791 and was granted town status in 1941. Population:
Zyryanovsk is located in the Rudnyi Altai, on the banks of the Berezovka River, a left tributary of the Bukhtarma. A 183-km railroad connects Zyrianovsk with Ust-Kamenogorsk. Also through Zyryanovsk there passes a highways Ust-Kamenogorsk – Rakhmanovskie Kluchi and Ust-Kamenogorsk – Bolshenarymskoe.
Zyrianovsk owed its establishment to the exploitation of a complex-ore deposit, discovered in 1791 by a local inhabitant, G. G. Zyrianov. Zyrianovsk has a lead combinat (division "Kazzinc"). The combine is educated from two mines (Maleevsky and Grekhovsky), concentrating factory, non-productive departments.
In the city the center of the East Kazakhstan state technical university, and also medical college, agrarian and technical college, humanitarian college, construction and transport college, industrial college functions.There are 8 schools, 3 kindergartens, 3 public libraries, Palace of culture, equipment and sports, the Equipments-House.