Stanisław Bohusz Siestrzeńcewicz, or Stanisłaŭ Bohuš-Siestrancevič (Belarusian: Станіслаў Богуш-Сестранцэвіч, 1731–1826) was a Belarusian who became the first bishop of the Metropolitan Archdiocese of Mohilev (Mogilev), an Archbishop from 1784 and a prominent member of the Russian Academy (1807), who had earlier converted from Calvinism.