"Nursultan Nazarbayev — 97.5%, Abelgazi Kusainov — 0.63%, Turgun Syzdykov — 1.87%," the think tank's head Yulia Kuchinskaya said.
The elections were set to take place next year, but Nazarbayev changed the date last month, explaining the move as a requirement to avoid political instability amid a global economic crisis.
The previous election runup in 2011 saw a vast majority proposing a referendum to extend Nazarbayev's credentials until 2020, but the president refused to do so. About 95 percent of Kazakhs voted for Nazarvayev in 2011.
The Kazakhstan constitution states that a candidate cannot be elected president more than twice in a row. Nazarbayev, however, was exempted from presidential term limits by a constitutional amendment in May 2007.
More than 800 observers from 19 countries at the polling stations reported no significant violations during the voting. Kazakhstan's Foreign Ministry accredited 168 representatives of foreign mass media from 37 countries.