Officers responded to a report of a stabbing in Cesar Chavez Park, located in the 100 block of South Market Street, at about 12:20 a.m., police Sgt. Heather Randol said.
When officers arrived at the park, they found a male suffering from at least one stab wound, Randol said.
Randol said the victim was transported to a hospital where he was later pronounced dead.
No suspects have been identified or apprehended, she said.
The homicide is the city's fifth of the year.