The western terminus of State Route 229 is at a T-intersection with State Route 47 just 0.25 miles (0.40 km) south of the village limits of Waldo.

State Route 229 runs through portions of five counties: Marion, Delaware, Morrow, Knox and Coshocton.

[2] When it was first established in 1930, State Route 229 ran from its junction with State Route 61 west of Marengo to downtown Mount Vernon.

[3][4] In 1937, the highway was extended on the western end to a new endpoint at U.S. Route 23 south of Waldo.

[5][6] Two years later, State Route 229 was extended again, this time on the east side, to its current eastern terminus in extreme western Coshocton County west of Nellie at what was then State Route 715, which would later trade alignments with U.S. Route 36.