| Canals to Pottsville (Pennsylvania) | 3,883.14 mi (6,249.32 km) |
| Canals to Poughkeepsie (New York) | 3,745.89 mi (6,028.43 km) |
| Canals to Poulsbo (Washington) | 5,470.27 mi (8,803.55 km) |
| Canals to Poway (California) | 6,012.50 mi (9,676.18 km) |
| Canals to Powder Springs (Georgia) | 4,516.55 mi (7,268.69 km) |
| Canals to Powell (Ohio) | 4,222.08 mi (6,794.79 km) |
| Canals to Powell (Tennessee) | 4,407.31 mi (7,092.88 km) |
| Canals to Prairie Ridge (Washington) | 5,485.13 mi (8,827.46 km) |
| Canals to Prairie Village (Kansas) | 4,790.58 mi (7,709.69 km) |
| Canals to Prairieville (Louisiana) | 4,958.01 mi (7,979.15 km) |
| Canals to Prattville (Alabama) | 4,655.14 mi (7,491.73 km) |
| Canals to Preakness (New Jersey) | 3,781.27 mi (6,085.37 km) |
| Canals to Prescott (Arizona) | 5,748.03 mi (9,250.57 km) |
| Canals to Prescott Valley (Arizona) | 5,742.09 mi (9,240.99 km) |
| Canals to Prichard (Alabama) | 4,801.44 mi (7,727.18 km) |
