The activist will be holding the rally for 17-year-old Trayvon Martin at the First Shiloh Baptist Church.
College students were also holding rallies at the Seminole County criminal courts building in Sanford and on the campus of Florida A&M University in Tallahassee Monday.
Martin, a junior at Miami's Krop Senior High School, was killed by 28-year-old George Zimmerman on Feb. 26. The teen had gone to a convenience store to buy Skittles and was walking back to his father's home in the gated community when he was confronted by Zimmerman.
Zimmerman, who had called police to report a suspicious person walking in the neighborhood, told police he shot the teen in self-defense.
No charges have been filed in the shooting, but Martin's family believe there should be.
"We're hoping this doesn't happen again to another family, and that America opens their eyes ... even though this won't bring Trayvon back, we don't want there to be another Trayvon," father Tracy Martin said.
Zimmerman's father says his son has been unfairly portrayed as a racist.