| Hackettstown to McKeesport (Pennsylvania) | 265.60 mi (427.44 km) |
| Hackettstown to McKinleyville (California) | 2,537.23 mi (4,083.28 km) |
| Hackettstown to McKinney (Texas) | 1,311.01 mi (2,109.87 km) |
| Hackettstown to McLean (Virginia) | 182.16 mi (293.15 km) |
| Hackettstown to McMinnville (Oregon) | 2,424.39 mi (3,901.69 km) |
| Hackettstown to McMinnville (Tennessee) | 692.50 mi (1,114.47 km) |
| Hackettstown to McNair (Virginia) | 189.90 mi (305.61 km) |
| Hackettstown to McPherson (Kansas) | 1,223.93 mi (1,969.72 km) |
| Hackettstown to Mead Valley (California) | 2,358.38 mi (3,795.44 km) |
| Hackettstown to Meadow Woods (Florida) | 938.17 mi (1,509.84 km) |
| Hackettstown to Meadowbrook (Virginia) | 275.84 mi (443.92 km) |
| Hackettstown to Meadville (Pennsylvania) | 281.75 mi (453.43 km) |
| Hackettstown to Mebane (North Carolina) | 407.86 mi (656.39 km) |
| Hackettstown to Mechanicsville (Virginia) | 260.87 mi (419.83 km) |
| Hackettstown to Medford (Massachusetts) | 220.42 mi (354.73 km) |
