Washington County Public Library Share: Library Washington County Public Library Visit Website Request Info 615 Fifth Street Marietta, OH 45750 (740) 373-1057 (740) 376-2171 (fax) About Map About public library What's Nearby? Distance: 5 10 15 20 25 50 mi. Upcoming Events view all events The Riverview Building 100 Front Street Marietta Ohio 45750(740) 373-5176