Impressively, those visitors come from all over the planet.
Many are also visiting Las Vegas, and the majority of those travelers arrive at the Grand Canyon by taking one of the many bus tours that leave from the city.
Luxury motor coach tours out of Las Vegas transport visitors to the National Park's West Rim or South Rim, but they also offer several affordable side trips.
For example, a West Rim Grand Canyon bus tour can be enhanced by adding a rafting trip down the Colorado River, a helicopter flight to the canyon floor, or a visit to the fabulous Grand Canyon Skywalk.
For a South Rim bus trip, you can add a helicopter flight to the North Rim and back, across Dragoon Corridor.
Grand Canyon bus trips make getting there half the fun of visiting the canyon.
Your motor coach to the Grand Canyon will take you along the sparkling shores of Lake Mead.
You'll then descend into Black Canyon and take the new Hoover Dam Bypass Bridge to cross over the mighty Colorado River.
On the drive back to Las Vegas, just about every canyon bus tour makes a stop at the Arizona side of the bridge.
Tour operators know their passengers will want to photograph Hoover Dam.
Your tour bus will pass through a series of deep mountain valleys before it descends into the Mojave Desert.
West Rim tours take a dirt road through a forest of ancient Joshua Trees.
South Rim tours carry on to Kingman, Arizona.
From there, they head west to Grand Canyon National Park.
Most of the road parallels fabled Route 66.
The Native American Hualapai tribe owns Grand Canyon West, where you'll leave your bus and start exploring the rim.
Eagle Point and Guano Point are two of the best-known canyon lookout points, but you'll also want to see the Indian Cultural Center and Hualapai Ranch.
If you're interested in experiencing the Skywalk, I urge you to add that package to your bus tour when you book - it will be cheaper that way.
That's also true for the helicopter flight you can add to a South Rim bus tour.
You'll pay more for it at the canyon than you would if you book it ahead.
This chopper trip is well worth every penny, though.
It leaves from the National Park Airport and takes you to the North Rim and back by flying over the canyon's deepest section.
The aerial views of Dragoon Corridor, the Colorado River and Grand Canyon Village are absolutely magnificent! The sleek, luxurious motor coaches used for canyon bus trips offer on-board restrooms, personal air conditioning units, DVD players, plasma TVs, window shades and dining trays.
Your driver will be completely familiar with the canyon and the passing landscape, and you'll be treated to an IMAX-type movie about Grand Canyon history.
There's a Grand Canyon bus trip for everyone, no matter what type you prefer.
Several different packages are available.
A basic tour will take you to the main gates, but add-ons include helicopter flights, rafting trips and Skywalk tickets.
Bus tours also include complementary hotel shuttle service and free lunch.
These tours sell out quickly, so don't delay.
Make your online booking arrangements now to ensure that your group gets the best seats!