Kozlovsky (masculine) or Kozlovskaya (feminine) is an East Slavic surname. Notable people with the surname include:
- Alexei Fedorovich Kozlovsky (1905–1977), Russian composer
- Alexei Ivanovich Kozlovsky (1932-1996), Ukrainian foreman
- Alexei Semyonovich Kozlovsky (1707-1776), Russian statesman
- Alexander Kozlovsky (disambiguation), several people
- Alfred Kozlovsky (1929-2013), Ukrainian metallurgist
- Danila Kozlovsky (born 1985), Russian actor
- Dmitrii Kozlovskii (born 1999), Russian pair skater
- Eugene Kozlovsky (1946–2023), Russian writer, journalist
- Ivan Kozlovsky (1900–1993), Soviet singer (tenor)
- Marina Kozlovskaya (1925–2019), Soviet Russian painter
- Mikhail Kozlovsky (1753–1802), Russian sculptor
- Osip Kozlovsky (1757–1831), Russian composer
- Pavel Pavlovich Kozlovsky (born 1942), Soviet and Belarusian general and politician
- Pyotr Kozlovsky (1783–1840), Russian diplomat and man of letters
- William P. Kozlovsky, American real admiral
- Valentina Kozlovskaya (born 1938), Russian chess player
- Ondřej Kozlovský (born 1982), Czech bobsledder
- Radim Kozlovský, paraplegic Czech athlete who participated in the 2006 Winter Paralympic Games in Turin
See also
edit- Kozlovsky (disambiguation)
- Kozłowski, a Polish last name