Rep. Michael McCaul (R-TX)

Estimated Net Worth: $294.21 million

Source: McCaul, who has ranked among the Top 50 richest lawmakers since first entering Congress in 2004, tops the list for the first time thanks to a significant transfer of wealth from his wife's family. His wife, Linda, is the daughter of Clear Channel Communications CEO Lowry Mays.

(Source: Roll Call)

