Because the Earth rotates at a greater speed closer to the equator, and Florida is close to the equator. This greater rotational speed makes it so that launch vehicles can use less thrust to obtain the velocity required to reach orbit.
And apart from that, it is near the Atlantic Ocean so there is a little probability that launch junks such as rocket booster empty containers can cause damage to people on the ground once they are detached.
Florida
cape canaveral,Florida
Atlantic ocean off the coast of central Florida
April 12th, 1981.
The space shuttle has to start straight up, like a rocket.
Florida
cape canaveral,Florida
Atlantic ocean off the coast of central Florida
NASA's Apollo and Space Shuttle spacecraft all launched from Cape Canaveral, Florida.
April 12th, 1981.
The space shuttle has to start straight up, like a rocket.
texas
straight up
A space shuttle travels at or around 7,500 MPH or miles per hour
All 5 Space Shuttles launch from Kennedy Space Center on the east coast of Florida, USA.
Never: The Shuttle has never been to the moon and never will.
April 12, 1981