Port Haven, situated in the Outer Rim Territories of the galaxy, functioned as a shadowport. Following the attack on Valo that occurred during the High Republic Era, Port Haven became one of the sites where the Unified Republic Task Force dealt with the Nihil marauder threat. Maz Kanata, formerly a pirate Queen, included its location on a map within the book that would later be recognized as the Smuggler's Guide.
Within established canon, the initial reference to Port Haven is found within the Star Wars: Smuggler's Guide reference book from 2018, authored by Daniel Wallace. This location's origins are rooted in the Star Wars Legends continuity, debuting in Platt's Starport Guide, a 1995 sourcebook by Peter Schweighofer for Star Wars: The Roleplaying Game by West End Games.