The value of land for sale in Passaic County, New Jersey, recently on Land.com was around $47 million. This represents nearly 100,000 acres of farms, hunting land and other rural land and acreage for sale in Passaic County. Based on the combined acreage of land and rural property for sale here, Passaic County has the most land for sale of the 21 counties in the Garden State. Among cities in Passaic County with land for sale, West Milford had the most land for sale. Passaic County is New Jersey's 18th biggest county (198 square miles). It's located in the North New Jersey region of the state.