State Route 534 (SR 534) is a north–south state highway in the northeastern portion of the U.S. state of Ohio. The southern terminus of SR 534 is at its junction with the duplex of U.S. Route 62 (US 62) and SR 173 nearly 4.50 miles (7.24 km) west of Salem. Its northern terminus is a curve in Geneva-on-the-Lake where the highway directly transitions into SR 531 at that route's western terminus.

SR 534's path takes it through the western portions of Mahoning, Trumbull and Ashtabula Counties. There are no segments of this highway that are included within the National Highway System (NHS). The NHS is a network of highways deemed most important for the nation's economy, mobility and defense.

This section needs expansion. You can help by adding to it. (March 2011)

SR 534 debuted in 1937. It was originally routed along the majority of its current alignment, excepting a short stretch in northwestern Ashtabula County. Prior to its inception, SR 534 consisted of previously un-numbered roads south of Windsor, and SR 45 from Windsor north to Geneva-on-the-Lake.

Prior to 1962, SR 534 utilized the Harpersfield Covered Bridge to cross the Grand River near Harpersfield, in the vicinity of its junction with SR 307. In that year, a new alignment of the state highway was constructed, bypassing the covered bridge to the east. As a result, the former alignment that utilized the covered bridge to pass over the Grand River was turned over to Ashtabula County, and renamed as County Road 154 (CR 154).

County	Location	mi	km	Destinations	Notes
Mahoning	Goshen Township	0.00	0.00	US 62 SR 173	Southern terminus on Columbiana–Mahoning County Line
		3.02	4.86	SR 165	Four-way stop intersection
		3.41	5.49	SR 14
	Berlin Township	8.60	13.84	US 224
	Milton Township	14.10	22.69	I-76	Exit 54 off of I-76, a diamond interchange
Trumbull	Braceville Township	21.98	35.37	SR 5	Signalized intersection
		24.26	39.04	SR 82	Four-way stop intersection with flashing beacon
	Southington Township	28.81	46.37	US 422	Signalized intersection
		29.57	47.59	SR 305	Five-way stop intersection
	Farmington Township	35.46	57.07	SR 88
	Mesopotamia Township	40.15	64.62	SR 87
Ashtabula	Windsor Township	45.63	73.43	US 322
		46.59	74.98	SR 86 north	T-intersection marking northwestern split of SR 86/SR 534 duplex; SR 86 departs to the northwest; Southern Terminus of SR 86
	Hartsgrove Township	50.94	81.98	US 6	Traffic circle
	Trumbull Township	54.83	88.24	SR 166 west	Eastern terminus of SR 166
	Harpersfield Township	61.83	99.51	SR 307
		62.55	100.66	I-90	Exit 218 off of I-90, a diamond interchange
	Geneva	63.95	102.92	SR 84	Signalized intersection
		65.08	104.74	US 20 / LECT	Signalized intersection
	Geneva-on-the-Lake	69.41	111.70	SR 531 / LECT east	Northern terminus at curve that doubles as western terminus of SR 531
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus