Bykhaw district or Bychaŭ district (Belarusian: Быхаўскі раён; Russian: Быховский район, romanized: Bykhovsky rayon) is a district (raion) of Mogilev region in Belarus. Its administrative center is the town of Bykhaw. As of 2009, its population was 35,148; the population accounted for 48.5% of the district's population. As of 2024, it has a population of 28,272.