Kostianets is a village in Khmelnytskyi Raion, in Khmelnytskyi Oblast, Ukraine. Kostianets lies at 300 m above sea level. The nearest city is Starokostiantyniv, 14.5 km to the south. Among the landmarks around are Samchyky Palace and Park Ensemble (18.0 km), Starokostiantyniv Castle (14.3 km) and Dominican monastery in Starokostiantyniv (14.8 km).
Also written Костянец.