| Country: | Switzerland |
| Birth Date: | 16 March 1948 |
| Birth Place: | Moscow, Soviet Union |
| Death Place: | Zurich, Switzerland |
| Woman Grandmaster (1977) | |
| Peakrating: | 2370 (January 1988) |
Tatjana Lematschko (March 16, 1948 - May 17, 2020) was a Soviet-born Swiss chess player, She was born in Moscow,[1] but lived in Bulgaria for several years.
She won both the Women's Bulgarian Chess Championship and Swiss Chess Championship several times.
She has competed for the world championship, most recently in the Women's World Chess Championship 1999.
At the 27th Chess Olympiad she won a medal for the best performance on no. 1 board.
WGM Tatjana Lematschko died in Zurich, aged 72.