| Middlesex to Keene (New Hampshire) | 199.48 mi (321.03 km) |
| Middlesex to Keizer (Oregon) | 2,442.29 mi (3,930.48 km) |
| Middlesex to Keller (Texas) | 1,359.22 mi (2,187.46 km) |
| Middlesex to Kelso (Washington) | 2,423.07 mi (3,899.55 km) |
| Middlesex to Kemp Mill (Maryland) | 170.63 mi (274.60 km) |
| Middlesex to Ken Caryl (Colorado) | 1,611.83 mi (2,593.98 km) |
| Middlesex to Kendale Lakes (Florida) | 1,081.81 mi (1,741.00 km) |
| Middlesex to Kendall (Florida) | 1,083.41 mi (1,743.58 km) |
| Middlesex to Kendall Park (New Jersey) | 11.58 mi (18.64 km) |
| Middlesex to Kendall West (Florida) | 1,082.47 mi (1,742.07 km) |
| Middlesex to Kenmore (New York) | 279.20 mi (449.34 km) |
| Middlesex to Kenmore (Washington) | 2,378.58 mi (3,827.96 km) |
| Middlesex to Kenner (Louisiana) | 1,146.62 mi (1,845.31 km) |
| Middlesex to Kennesaw (Georgia) | 716.00 mi (1,152.29 km) |
| Middlesex to Kennett (Missouri) | 891.94 mi (1,435.44 km) |
