Driving distance from Las Vegas, NV to Hoover Dam. The total driving distance from Las Vegas, NV to Hoover Dam is 33 miles or 53 kilometers. Your trip begins in Las Vegas, Nevada. It ends in Hoover Dam, Nevada. If you are planning a road trip, you might also want to calculate the total driving time from Las Vegas, NV to Hoover Dam so you can see when you'll arrive at your destination.