| Gresham to Orangevale (California) | 474.92 mi (764.32 km) |
| Gresham to Orchards (Washington) | 13.62 mi (21.91 km) |
| Gresham to Orcutt (California) | 742.29 mi (1,194.60 km) |
| Gresham to Oregon (Ohio) | 1,951.11 mi (3,140.01 km) |
| Gresham to Oregon (Wisconsin) | 1,634.80 mi (2,630.96 km) |
| Gresham to Oregon City (Oregon) | 13.28 mi (21.37 km) |
| Gresham to Orem (Utah) | 650.96 mi (1,047.62 km) |
| Gresham to Orinda (California) | 526.75 mi (847.73 km) |
| Gresham to Orland Park (Illinois) | 1,738.51 mi (2,797.86 km) |
| Gresham to Orlando (Florida) | 2,518.80 mi (4,053.62 km) |
| Gresham to Ormond Beach (Florida) | 2,494.46 mi (4,014.45 km) |
| Gresham to Oro Valley (Arizona) | 1,091.28 mi (1,756.24 km) |
| Gresham to Oroville (California) | 417.11 mi (671.27 km) |
| Gresham to Oshkosh (Wisconsin) | 1,652.86 mi (2,660.02 km) |
| Gresham to Oskaloosa (Iowa) | 1,515.00 mi (2,438.15 km) |
