Ridder, Kazakhstan

Ridder
Риддер
Image of Ridder taken from the International Space Station
Ridder
Location in Kazakhstan
Coordinates: 50°21′N 83°31′E / 50.350°N 83.517°E / 50.350; 83.517
Country Kazakhstan
RegionEast Kazakhstan Region
FoundedMay 31, 1786
Incorporated (city)February 10, 1934
Government
  Akim (mayor)Duman Rakhmetkaliev
Elevation
730 m (2,400 ft)
Population
 (2025)
  Total
50,874
Time zoneUTC+6
Area code+7 72336

Ridder (Kazakh: Риддер, romanized: Ridder), formerly known as Leninogorsk (Russian: Лениногорск) is a city in the East Kazakhstan Region in north-eastern Kazakhstan. Its population is approximately 50,500 (2009 census results). The city is situated in the south-western Altai Mountains and north-east of the region's capital, Oskemen, along the Ulba River, at an elevation higher than 700 metres. Ridder is the source of the E40 motorway.