The largest alligator ever caught in Florida was 17 feet 5 inches. The largest alligator ever reported was found in Louisiana, and it measured 19 feet 3 inches.
Adult alligators usually measure between 13 and 15 feet in length, and they weigh between 500 and 1,000 pounds. Alligators reach maturity when they have grown to a length of 6 to 8 feet, usually between the ages of 8 and 13 years. They continue to grow throughout their lives and can live up to 30 years of age in the wild or as long as 50 years in captivity. However, their rate of growth slows with age.