Barys Uladzimiravich Kit (Belarusian: Бары́с Уладзімеравіч Кіт, Russian: Бори́с Влади́мирович Кит; April 6, 1910 – February 1, 2018) was a Belarusian American rocket scientist. He was born in Saint Petersburg, Russian Empire.
In the mid-1950s Kit began his scientific activities in the field of astronautics. He worked for 25 years in the American space research program. As a mathematician and systems analyst, he took part in projects aimed at the development of intercontinental missile systems.