[1][6] At the time of its first designation in 1923, the route began east of Hanover in Licking County at SR 16.

[1] No major changes would occur to the routing until the entire designation was removed around 1959.

SR 177 was a short-lived state route in a now former section Washington Township, Lucas County.

The route started at SR 6 (Detroit Avenue) north of the Toledo city limits and traveled due north along Crabb Road and Telegraph Road to the Michigan state line.

[5][16] It began in Goshen Township at SR 259 and headed north west towards New Philadelphia.

[13] First designated in 1923, the route traveled north-northwest from its southern terminus towards Ganges and Shiloh.

From 1923 until 1969, the route stretched between Upper Sandusky at US 30N (originally SR 5) to US 30N at a point between Oceola and Bucyrus.

[23] SR 182 was removed from the state highway system between 2005 and 2007, around the time the nearby US 30 expressway was completed between Upper Sandusky and Bucyrus.

[3][24] SR 183 was a state route in Lucas County, at the time northwest of the city limits of Toledo.

For most of its history, the route began at SR 246 (Dorr Street) near Ottawa Hills and headed due north along Secor Road.

Near the Michigan state line, the route made a turn to the left onto Whiteford Center Road before ending at the border.

[16][25] At the time of its first designation in 1923 and 1924, SR 183 started in western Toledo, headed west on Dorr Street and then turned north onto its routing as previously described.

[1][26] For the next two years, the route started near Maumee and traveled north along Byrne Road to the point of its long-time southern terminus.

[32] SR 185 was a short state route in northern Henry County that existed from 1923 until 1926.

For most of its history, the route was a five-mile-long (8.0 km) connector between SR 101 south of Clyde to US 20 west of Bellevue.

[35] SR 187 was a state highway that served as a 11-mile-long (18 km) connector between Leipsic and McComb.

[1][4][8] SR 188 was a state route in Putnam and Henry Counties in northwestern Ohio.

[3] SR 192 was an eight-mile-long (13 km) route in Williams County, located in the northwest corner of Ohio.

[35] SR 194 was a short state highway connecting the villages of Payne and Paulding from 1923 until 1926.

[2][16] Around 1933, the route was extended slightly to the west to head through downtown Willard on Tiffin Street and south along Main Street to end at SR 17 (later US 224) bringing the total length of the highway to 4.13 miles (6.65 km).

At that point, the route turned in a more northerly direction and ended at SR 79 in Fallsbury Township.

[13][35] Today, all of the former SR 207 outside of the Hanover village limits is a part of Licking County Road 668.

SR 214 followed the top of a ridge while traveling through Richland and Pultney Townships before starting its descent into Bellaire.

At the time, SR 7 was routed along Noble north of here and Central for one block east of this point.