| Forest Grove to Kinston (North Carolina) | 2,461.37 mi (3,961.19 km) |
| Forest Grove to Kirkland (Washington) | 156.13 mi (251.26 km) |
| Forest Grove to Kirksville (Missouri) | 1,579.31 mi (2,541.65 km) |
| Forest Grove to Kirkwood (Missouri) | 1,731.04 mi (2,785.84 km) |
| Forest Grove to Kiryas Joel (New York) | 2,434.35 mi (3,917.71 km) |
| Forest Grove to Kissimmee (Florida) | 2,554.44 mi (4,110.98 km) |
| Forest Grove to Klamath Falls (Oregon) | 237.80 mi (382.71 km) |
| Forest Grove to Knightdale (North Carolina) | 2,399.52 mi (3,861.66 km) |
| Forest Grove to Knik-Fairview (Alaska) | 1,530.58 mi (2,463.23 km) |
| Forest Grove to Knoxville (Tennessee) | 2,129.59 mi (3,427.24 km) |
| Forest Grove to Kokomo (Indiana) | 1,884.07 mi (3,032.11 km) |
| Forest Grove to Kuna (Idaho) | 359.47 mi (578.51 km) |
| Forest Grove to Kyle (Texas) | 1,733.72 mi (2,790.14 km) |
| Forest Grove to La Cañada Flintridge (California) | 823.55 mi (1,325.38 km) |
| Forest Grove to La Crescenta-Montrose (California) | 821.48 mi (1,322.05 km) |
