Starokostiantyniv (Ukrainian: Старокостянтинів, IPA: [ˌstɐrokostʲɐnˈtɪniu̯] ⓘ; Polish: Starokonstantynów, or Konstantynów; Yiddish: אלט-קאָנסטאַנטין, romanized: Alt Konstantin) is a city in Khmelnytskyi Raion, Khmelnytskyi Oblast (province) of western Ukraine.

[2] Grand Duchy of Lithuania 1525–1569 Polish–Lithuanian Commonwealth 1569–1793 Russian Empire 1793–1917 Ukrainian People's Republic / Republic of Poland 1917-1920 Soviet Ukraine 1920–1922 Soviet Union 1922–1991 Nazi Germany 1941–1944 (occupation) Ukraine 1991–present Starokostiantyniv was founded in the 16th century when Konstanty Ostrogski built a fortress at the village of Kolishchentsi.

The 1st Infantry Regiment of the Polish Crown Army was stationed in the town in 1791 before it was relocated to Kalisz.

The Jewish community was murdered in mass executions perpetrated from August 1941 until November 1942.

In the postwar period, the city grew significantly due to the development of industry (mechanical engineering and metalworking, food processing, etc.)