| Forest Grove to Oak Harbor (Washington) | 192.85 mi (310.36 km) |
| Forest Grove to Oak Hills (Oregon) | 13.04 mi (20.98 km) |
| Forest Grove to Oak Lawn (Illinois) | 1,773.37 mi (2,853.97 km) |
| Forest Grove to Oak Park (California) | 816.29 mi (1,313.70 km) |
| Forest Grove to Oak Park (Illinois) | 1,767.40 mi (2,844.36 km) |
| Forest Grove to Oak Park (Michigan) | 1,975.26 mi (3,178.88 km) |
| Forest Grove to Oak Ridge (Florida) | 2,547.09 mi (4,099.15 km) |
| Forest Grove to Oak Ridge (New Jersey) | 2,427.27 mi (3,906.31 km) |
| Forest Grove to Oak Ridge (Tennessee) | 2,113.16 mi (3,400.80 km) |
| Forest Grove to Oakdale (California) | 548.85 mi (883.29 km) |
| Forest Grove to Oakdale (Minnesota) | 1,458.03 mi (2,346.47 km) |
| Forest Grove to Oakland (California) | 536.34 mi (863.15 km) |
| Forest Grove to Oakland (New Jersey) | 2,439.49 mi (3,925.98 km) |
| Forest Grove to Oakland Park (Florida) | 2,708.45 mi (4,358.82 km) |
| Forest Grove to Oakleaf Plantation (Florida) | 2,454.91 mi (3,950.79 km) |
