Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Maplewood Park is a census-designated place (CDP) in Trumbull County, Ohio, United States. The population was 321 at the 2000 census. It is part of the Youngstown Warren Boardman, OH-PA Metropolitan Statistical Area. According to the United States Census Bureau, the CDP has a total area of 0.8 square miles (1.9 km²), all of it land.