Currently there are two courses located in Duval County.

Ed Austin Regional Park
Fore Palms Disc Golf Course 24 holes (18 perm and 6 temp)
Course Map ---- Score Card ---- Video
11751 McCormick Road Map It
Jacksonville, FL 32215

Kathryn Abbey Hanna Park
Ocean Wonder ( unofficially "Spiders Den" ) Disc Golf Course 9 holes (2 sets of tee pads)
Course Map ---- Score Card ---- Video
500 Wonderwood Drive Map It
Jacksonville, FL 32233

Other courses within 90 miles of Jacksonville:

Saint Augustine , Florida
Good News Disc Golf Course

Gainesville , Florida
Northside Park

Gainesville (Micanopy), Florida
Lake Wauburg

Daytona Beach , Florida
Tuscawilla Park

Pooler, Georgia  
Tom Triplett DGC