| State: | OR |
| Type: | OR |
| Route: | 273 |
| Map Custom: | yes |
| Map Notes: | Route 273 highlighted in red |
| Length Mi: | 12.42 |
| Length Round: | 2 |
| Direction A: | South |
| Terminus A: | near Ashland |
| Junction: | near Ashland |
| Direction B: | North |
| Terminus B: | near Ashland |
| Established: | 2003 |
| Previous Type: | OR |
| Previous Route: | 260 |
| Next Type: | OR |
| Next Route: | 281 |
Oregon Route 273 is an Oregon state highway running from OR 66 near Ashland to Interstate 5 near the California state line. OR 273 is known as the Siskiyou Highway No. 273 (see Oregon highways and routes). It is 12.42miles long and runs north–south parallel of I-5, entirely within Jackson County.
OR 273 was established in 2003 as part of Oregon's project to assign route numbers to highways that previously were not assigned.
OR 273 begins at an intersection with OR 66 approximately four miles southeast of Ashland and heads south, intersecting with I-5 at I-5 Exit 6 and continuing to I-5 Exit 1, where it ends.
OR 273 is an old section of US 99. OR 273 was assigned to the Siskiyou Highway in 2003.