Sergey Nikolayev (Russian: Сергей Николаев; born 12 November 1966) is a Russian former track and field athlete who competed in the shot put. He set a personal best of in 1989. He represented the Soviet Union at the 1991 World Championships in Athletics, placing fifth, and was a two-time participant at the European Athletics Championships, in 1990 and 1994. His highest world seasonal ranking – sixth – came in 1989.
Nikolayev was a silver medallist at the 1992 IAAF World Cup.[1] He was also a bronze medallist on home turf at the 1994 Goodwill Games, taking third behind Americans C. J. Hunter and Randy Barnes.[2]
He was twice national champion at the Russian Athletics Championships, winning the shot put in 1994 and 1998.[3] He competed as a guest at the Japan Championships in Athletics in 1990 and won in a meet record of .[4]
| 1990 | European Championships | Split, Yugoslavia | 7th | Shot put | 19.97 m | |
| 1991 | World Championships | Tokyo, Japan | 5th | Shot put | 19.98 m | |
| 1992 | IAAF World Cup | Havana, Cuba | bgcolor=silver | 2nd | Shot put | 20.14 m |
| 1994 | European Championships | Helsinki, Finland | — | Shot put | ||
| Goodwill Games | Saint Petersburg, Russia | 3rd | Shot put | 20.11 m |