OH 521 Travel Info
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State Route 521 (SR 521) is an east–west state highway in central Ohio. Existing entirely within Delaware County, the western terminus of State Route 521 is at the U.S. Route 36/State Route 37 duplex in Delaware. Its eastern terminus is at State Route 656 in the hamlet of Olive Green, located approximately 5 miles (8.0 km) north of Sunbury.
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