Ostrovec-Lhotka is a municipality in Rokycany District in the Plzeà  Region of the Czech Republic. It has about 100 inhabitants. The village of Ostrovec is well preserved and is protected as a village monument zone.
Ostrovec-Lhotka lies approximately east of Rokycany, east of Plzeà Â, and south-west of Prague.
Ostrovec-Lhotka consists of two municipal parts (in brackets population according to the 2021 census):