The 2018 Oracle Challenger Series – Houston was a professional tennis tournament played on outdoor hard courts.

This tournament was part of the 2018 ATP Challenger Tour and the 2018 WTA 125K series.

[1] The first edition took place at the George R. Brown Tennis Center from November 12 to 18, 2018 in Houston, United States.

[2] The following players received wildcards into the singles main draw: The following players received entry from the qualifying draw: The following players received wildcards into the singles main draw: The following players received entry from the qualifying draw: The following players received entry into the main draw as lucky losers: The following pair received a wildcard into the doubles main draw: