If you are talking about Rockville Twp, IL, it is 46 miles taking this route:
40 miles
There are about 138 miles between Turnersville, NJ and Rockville, MD.
22 miles
334 miles
5,912 miles
Joliet, IL is 62.77 sq mi (163 km2).
500 miles
Snellville to Rockville, MD is about 640 miles. Snellville to Rockville, SC is about 290 miles. Snellville to Rockwell, NC is about 260 miles.
84 miles down U.S. 41.
It is 40.8 miles according to Google Maps.
It is 50.1 miles according to Google Maps.
It is 70.4 miles according to Google Maps.