The 2013 U.S. National Indoor Tennis Championships was an ATP World Tour and WTA Tour event held at the hardcourts of the Racquet Club of Memphis in Memphis, Tennessee, United States.

It was the 38th edition of the U.S. National Indoor Tennis Championships and the 28th edition of the Memphis WTA International Event.

The U.S. National Indoor Tennis Championships is part of the ATP World Tour 500 series on the 2013 ATP World Tour, and the Memphis International is an International-level tournament on the 2013 WTA Tour.

Kei Nishikori and Marina Erakovic won the singles titles.

* per team The following players received wildcards into the main draw: The following players received entry from the qualifying draw: The following player received entry as a lucky loser: The following pairs received wildcard into the doubles main draw: The following pairs received entry as alternates: The following players received wildcards into the main draw: The following players received entry from the qualifying draw: The following pairs received wildcard into the doubles main draw: The following pairs received entry as alternates: