What percentage of southerners owned large slave plantations?

In the pre-Civil War South, only about 1-2% of white families owned large slave plantations, typically defined as having 20 or more enslaved individuals. While slavery was a widespread institution that supported the Southern economy, the majority of white Southerners were not plantation owners but rather small farmers or landless laborers. The concentration of wealth and land among these large plantation owners significantly shaped the social and economic dynamics of the region.