Fester or Fester's may refer to:
Fester Bestertester, a character created by cartoonist Don Martin Fester Hollow, a tributary of the West Branch Briar Creek in Columbia County, Pennsylvania Fester Kun Med Mig Selv, a single by Danish singer Jon Nørgaard Uncle Fester, or Fester Addams, a member of the fictional Addams Family Uncle Fester (author), the nom de plume of Steve Preisler, author Fester's Quest, a video game starring Fester Addams
Surname Emilia Fester (born 1998), German politician (The Greens) Gertrude Fester (born 1952), South African feminist, women's activist and politician Richard Fester (1860 – 1945), German historian
See also Pus, an exudate formed at the site of inflammation during infection