| Rockville to Worthington (Ohio) | 319.98 mi (514.95 km) |
| Rockville to Wright (Florida) | 802.91 mi (1,292.16 km) |
| Rockville to Wyandanch (New York) | 231.56 mi (372.66 km) |
| Rockville to Wyandotte (Michigan) | 381.50 mi (613.96 km) |
| Rockville to Wylie (Texas) | 1,156.42 mi (1,861.08 km) |
| Rockville to Wyndham (Virginia) | 99.24 mi (159.72 km) |
| Rockville to Wyoming (Michigan) | 517.42 mi (832.70 km) |
| Rockville to Wyomissing (Pennsylvania) | 106.80 mi (171.88 km) |
| Rockville to Xenia (Ohio) | 364.67 mi (586.87 km) |
| Rockville to Yakima (Washington) | 2,229.12 mi (3,587.41 km) |
| Rockville to Yankton (South Dakota) | 1,084.85 mi (1,745.90 km) |
| Rockville to Yauco (Puerto Rico) | 1,580.12 mi (2,542.95 km) |
| Rockville to Yazoo City (Mississippi) | 855.37 mi (1,376.59 km) |
| Rockville to Yeadon (Pennsylvania) | 117.17 mi (188.56 km) |
| Rockville to Yelm (Washington) | 2,326.03 mi (3,743.38 km) |
