The median income of middle-class households increased from about $66,400 in 1970 to $106,100 in 2022, or 60%. Over this period, the median income of upper-income households increased 78%, from about $144,100 to $256,900. (Incomes are scaled to a three-person household and expressed in 2023 dollars.)
The median income of lower-income households grew more slowly than that of other households, increasing from about $22,800 in 1970 to $35,300 in 2022, or 55%.