Pat Harrison Waterway District (PHWD) is a Mississippi State Agency with headquarters in Hattiesburg.

Funding for PHWD comes from ad valorem taxes collected in member Counties, park recreation fees, timber sales, and interest from investments.

[6] In the summer of 2018, PHWD moved out of their 56-year-old office building located at 6081 U.S. Route 49 south, as part of a lawsuit settlement with Forrest County.

[8][9][10] Water resources in the Pascagoula River Basin, over which Pat Harrison Waterway District has jurisdiction, include:[5] The agency oversees eight water parks with public amenities that include camp sites, boat launches, cabins, picnic areas, swimming areas, and meeting facilities.

[5] Little Black Creek Water Park (Lumberton, MS) was formerly managed by PHWD, but was leased to a private developer in 2013.