Cairo, OH

ZIP code 45820 belongs to Celina, Ohio, a picturesque small town on the shores of Grand Lake St. Marys. The area is known for its beautiful scenery and outdoor recreational activities, such as boating and fishing on the lake. Important landmarks in the area include Grand Lake State Park, Mercelina Park, and the Celina Main Street Historic District, which boasts charming shops and restaurants for residents and visitors alike.