Krista Fischer (born 5 August 1970)[1] is an Estonian biostatistician whose research concerns body mass, genetic variability, and their association with diseases.

She is a professor of mathematical statistics in the Institute of Mathematics and Statistics at the University of Tartu, where she is also an associate professor in the Institute of Genomics.

[2] Fischer was an undergraduate at the University of Tartu, specializing in mathematics and statistics, from 1988 to 1992.

After earning a master's degree in mathematical statistics at Limburg University in Belgium in 1994, she returned to Tartu for doctoral study, completing her Ph.D. in 1999.

She worked as a senior researcher at the Estonian Genome Center at the University of Tartu from 2010 to 2018, when she became a professor of mathematical statistics.