This record has a bit of controversy surrounding it. This 17.27-pound largemouth was caught by Bill O’Berry in Polk County in 1986. However, there was a 20.13 pound bass caught on Big Fish Lake in 1923, but it was weighed on a postal scale and while there were witnesses, there was not a Florida biologist on hand to verify, it’s not the officiall record. 

You can see more here: https://myfwc.com/news/all-news/record-fish-320/