•
1926 – Original route certified; originally routed along its current alignment from Oldtown to Fairborn (which was Fairfield and Osborn in 1926). •
March 9, 1932 – Extended north to
State Route 4 approximately north of Fairborn along previously unnumbered road. •
1969 – Extended north to its current terminus along previous State Route 69. In summer 2020, ODOT made plans to convert the intersection with
US 68, SR 235's southern terminus, to a
roundabout, near
Oldtown in
Xenia Township, Greene County, almost north of downtown Xenia. Construction was expected to begin in spring 2023 and to be completed that fall, with an estimated cost of $2 million. However, site preparations did not begin until early June 2024, and it was announced that construction would begin on July 16, at a cost of $2.29 million, to be completed by the fall. On December 3, 2024, the roundabout was substantially completed except for minor finish work such as landscaping, which is scheduled to be done in spring 2025.
State Route 69 before 1969 •
1923 – Originally routed from
Dayton to
Forest. •
1938 – Extended north to
McComb along previously unnumbered road, from McComb to
Hoytville along the previous alignment of
State Route 186, and from Hoytville to east of
Grand Rapids along a previously unnumbered road. ==Future==