Depends on where you look .... but some places list a 6lb Crappie from Louisiana. Here's a quote from a 2021 Field & Stream article :
"Records on the state and even national level are not always rock-solid, especially older records. Certified weigh scales, verifiable witnesses to the catch, accurate measurements, and cameras were not as readily available as they are today. Considering that some of the biggest fish recorded were caught decades ago, many are not documented by photo, and some that may be listed as state records are a bit thin on verifiable catch documentation."
"For example, the largest record black crappie touted by many sources is a 6-pounder taken in Louisiana in November 1969 by Lettie Robertson. At one time, the International Game Fish Association (IGFA) considered the catch a world record. But no photos of the fish are available, and other information about the catch is minimal. Though the IGFA has retired the fish from its record book, the National Freshwater Fishing Hall of Fame still lists this massive 6-pounder as the world-record."