A Florida sheriff made it clear his county won’t put up with protests that go from peaceful to violent … promising lethal force if anyone steps out of line.

Wayne Ivey — the sheriff of Brevard County, just east of Orlando — spoke at a press conference about the recent clashes between U.S. Immigration and Customs Enforcement officers and protesters in L.A. … and, he used some harsh rhetoric to scare people who might think it’s a good idea to try the same in FL.

Sheriff Ivey leaves no room for interpretation … telling the assembled press that resisting lawful orders, blocking an intersection or fleeing arrest will result in jail time.

The sheriff says spitting on a cop or hitting a cop will land a person in the hospital … and, afterward, jail.

Finally, Sheriff Ivey takes his hardest stance yet … letting people know if they point a gun at a cop, throw a firebomb or even toss a brick at a cop, then they won’t need a jail cell — because the officers will just direct their families to their remains.

Ivey boils it down simply so there’s no confusion … his officers are bringing back law and order Old West style — and a step out of line could land ya “graveyard dead” as he puts it.