Eldorado, OH

ZIP code 45321 covers the area of Celina, Ohio. Located along the shores of Grand Lake St. Marys, this picturesque town boasts attractions such as the Mercer County Fairgrounds, the Grand Lake St. Marys State Park, and the Celina Rotary Dog Park. Residents and visitors alike can enjoy boating, fishing, and outdoor activities in this scenic and vibrant community.