Stacey asked: I wish to know if biking on sidewalks is allowed in Charlotte and Sarasota Counties in Florida.
I can find no restriction to cycling on the sidewalks of either county. You can check the code of ordinances for those counties here:
Be aware that a municipality may have local ordinances concerning sidewalk cycling. You can find those by searching for “Muni Codes (insert the name of the city and state of interest)”.