Mineola is an unincorporated community in western Montgomery County, Missouri, United States. The community is located on Missouri Supplemental Route J and is about one mile south from Interstate 70. Montgomery City is approximately six miles north of the community. It is on the east bank of the Loutre River. Graham Cave within Graham Cav…Mineola is an unincorporated community in western Montgomery County, Missouri, United States. The community is located on Missouri Supplemental Route J and is about one mile south from Interstate 70. Montgomery City is approximately six miles north of the community. It is on the east bank of the Loutre River. Graham Cave within Graham Cave State Park is on the north side of I-70 just north of the community and Mount Horeb Baptist Church is approximately 4.5 miles to the southwest.