| State: | PA |
| Type: | PA |
| Route: | 358 |
| Length Mi: | 25.2 |
| Length Round: | 1 |
| Map Custom: | yes |
| Direction A: | West |
| Terminus A: | at Ohio state line in West Salem Township |
| Junction: |
|
| Direction B: | East |
| Terminus B: | in Sandy Lake |
| Counties: | Mercer |
| Previous Type: | PA |
| Previous Route: | 356 |
| Next Type: | PA |
| Next Route: | 359 |
Pennsylvania Route 358 (PA 358) is located in Western Pennsylvania, running from the Ohio state line 6miles west of Greenville to Sandy Lake in Mercer County.
Heading east from the Ohio state line in Mercer County, PA 358 travels through the village of Maysville about 3.4miles from the state line. Next the route enters the borough of Greenville about 3.3miles later, and intersects with PA 18, which joins PA 358 through the borough about 0.5miles. East of downtown, PA 58 joins the concurrency for 0.3miles, and then both PA 18 and PA 58 leave PA 358. The route continues out of Greenville, and passes near the village of Hadley about 7.8miles later, and then intersects with US 19 about 1.5miles after that. About 2.3miles later, the route passes through the village of Clarks Mills, and then interchanges with I-79 1.4miles later. PA 358 continues 2.4miles, where it intersects with the north terminus of PA 845 north of Stoneboro, and then the route terminates another 2.3miles later in the borough of Sandy Lake at the north terminus of the US 62/PA 173 concurrency.
In 1928, PA 358 was originally signed from the Ohio state line to Greenville. The Greenville-to-Sandy Lake alignment was originally signed PA 846 through 1936. The eastern terminus was moved from Greenville to its current location in 1936. In 1954, the eastern terminus was moved back to Greenville. The Greenville-to-Sandy Lake alignment was signed Alternate US 322 through 1964. In 1964, the eastern terminus was moved back to its current location.[1]