According to earthsky.org:
On August 21, 2017 a total eclipse of the sun will be visible from within a narrow corridor that traverses the United States. The path of the moon’s umbral shadow begins in the northern Pacific and crosses the U.S. from west to east through parts of the following states: Oregon, Idaho, Montana, Wyoming, Nebraska, Kansas, Missouri, Illinois, Kentucky, Tennessee, North Carolina, Georgia, and South Carolina. The moon’s penumbral shadow produces a partial eclipse visible from a much larger region covering most of North America.
Here's a link from earthsky.org with more information than you can handle at one sitting: earthsky.org resources.