Waycross was a planet located somewhere in the space of the galaxy's Alpha or Beta Quadrants.
History and specifics
In 2269, the USS Enterprise was assigned to ferry an urgently-needed medical team and supplies to Waycross. The USS Phoenix was also assigned to bring replacement equipment and an additional doctor. The Enterprise was delayed when the ship was attacked by Korol, but succeeded in its mission. (TOS novel: Perry's Planet)