| Round Lake Beach to Jeffersontown (Kentucky) | 317.28 mi (510.61 km) |
| Round Lake Beach to Jeffersonville (Indiana) | 306.00 mi (492.46 km) |
| Round Lake Beach to Jenison (Michigan) | 120.22 mi (193.47 km) |
| Round Lake Beach to Jenks (Oklahoma) | 610.21 mi (982.04 km) |
| Round Lake Beach to Jennings (Missouri) | 277.37 mi (446.38 km) |
| Round Lake Beach to Jensen Beach (Florida) | 1,135.08 mi (1,826.74 km) |
| Round Lake Beach to Jericho (New York) | 758.46 mi (1,220.63 km) |
| Round Lake Beach to Jerome (Idaho) | 1,340.25 mi (2,156.93 km) |
| Round Lake Beach to Jersey City (New Jersey) | 732.73 mi (1,179.21 km) |
| Round Lake Beach to Jessup (Maryland) | 631.64 mi (1,016.52 km) |
| Round Lake Beach to Johns Creek (Georgia) | 613.69 mi (987.65 km) |
| Round Lake Beach to Johnson City (New York) | 619.52 mi (997.02 km) |
| Round Lake Beach to Johnson City (Tennessee) | 516.26 mi (830.83 km) |
| Round Lake Beach to Johnston (Iowa) | 293.37 mi (472.14 km) |
| Round Lake Beach to Johnstown (Colorado) | 884.31 mi (1,423.15 km) |
