The jurors notified the judge Saturday night a little before 10 p.m. that they had reached a decision.
The six-member, all-woman jury began deliberating at 2:30 p.m. Friday after spending part of the day listening to the defense closing arguments and a rebuttal from the prosecution.
Zimmerman is charged with second-degree murder in Trayvon Martin's death, but jurors could also have chosen manslaughter. Zimmerman claims he shot Martin in self-defense.
The case drew massive protests after a 44-day delay in Zimmerman's arrest. Demonstrators demanded Zimmerman's arrest.
The police chief in Sanford, where Martin was shot and where the trial is being held, urged peace after the verdict is read.
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