Highland County Office Serving Highland County. 100 S High St, Suite 208 Hillsboro, OH 45133 100 S High St, Suite 208, Hillsboro, OH 45133 Address 100 S High St, Suite 208 Hillsboro, OH 45133 Office Phone 937-795-4980 Fax 937-795-4981 Hours M-F, 8:00 a.m. - 4:00 p.m. Loading... Psychiatry Counseling Home-Based Supportive Services