The 2020 Ann Arbor Challenger was a professional tennis tournament played on indoor hard courts.

It was the tournament's first edition, a part of the 2020 ATP Challenger Tour.

It took place in Ann Arbor, Michigan, United States between January 6 and 12, 2020.

The following players received wildcards into the singles main draw: The following players received entry into the singles main draw using protected rankings: The following players received entry from the qualifying draw: