Antoniów is a village located in the administrative district of Gmina Żarnów, within Opoczno County, Łódź Voivodeship, in central Poland. It is situated approximately 6 kilometers (4 miles) south of the town of Żarnów, 23 kilometers (14 miles) south of the county seat of Opoczno, and 82 kilometers (51 miles) south-east of the regional capital, Łódź.
Administratively, Antoniów is classified as a village (wieś) and is recorded in the National Register of Territorial Land Apportionment Journal (TERYT) under the identification system of the Polish Central Statistical Office. The settlement is part of a rural region characterized primarily by agricultural land use and small-scale forestry.
The village falls under the jurisdiction of the local government in Żarnów and the Roman Catholic parish structures of the Diocese of Radom. While historical records for small settlements in the Opoczno region often date back to the early modern period, specific demographic and historical data for Antoniów are limited in general encyclopedic sources beyond official administrative listings and census data.