Berlin is an unincorporated community in northern Florence Township, Williams County, Ohio, United States.
[1] It is located in the northwest corner of Ohio, approximately two miles from Indiana and six miles from Michigan.
It lies along State Route 49, a short distance south of the Ohio Turnpike.
It is located at latitude 41° 36' 34" north and longitude 84° 45' 16" west.
The elevation is 942 feet above sea level.