Founded in 1889, Sherman County is one of 36 counties in the state of Oregon. Historically, Sherman County was formed from Northeast corner of Wasco County. The city of Moro is the county seat. With FIPS code of 55, Sherman County has a population of 1,907 and area of 823 square miles (2,132 km2).
List of all cities in Sherman County, OR alphabetically
| City/Town | Postal Code | Area Code |
| Biggs, OR | 97065 | 541 |
| Biggs Junction, OR | 97065 | 541 |
| Grass Valley, OR | 97029 | 541 |
| Kent, OR | 97033 | 541 |
| Moro, OR | 97039 | 541 |
| Rufus, OR | 97050 | 541 |
| Wasco, OR | 97065 | 541 |