Starokostiantyniv is a city located in the Khmelnytskyi Raion of the Khmelnytskyi Oblast in western Ukraine. It serves as the administrative center for the Starokostiantyniv urban hromada, which is one of the local administrative divisions within the country.
The city has a population that was recorded at 33,921 in previous data, with estimates indicating approximately 30,000 residents living there in 2025.