Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Ijamsville is an unincorporated community located 7 miles southeast of Frederick, Maryland, in Frederick County, Maryland, United States. In 1785, a gentleman by the name of Plummer Ijams became the first recorded resident of what would become Ijamsville. Plummer Ijams died on June 14, 1796. His son, John, developed a gristmill that became a center of community life in the area, which became known as Ijams Mill.