The former "James Bond" star is replacing Sam Neill, who had been originally cast in the role but left for personal reasons, reported Deadline.
This marks only the second major TV series gig for Brosnan three decades after his starring role on the 1982 NBC adventure dramedy "Remington Steele".
Based on the book by Philipp Meyer and written by Meyer, Lee Shipman and Brian McGreevy, "The Son" is a multi-generational epic tale of the story of America's birth as a superpower through the bloody rise and fall of one Texas family.
As a child, he was kidnapped and raised among the Comanche Native American tribe and applies the brutal Comanche worldview to his business dealings.
Also Read
He was born on the day Texas became an independent Republic, earning the nickname "First Son of Texas" and is a relic of the Wild West, uneasy with the inexorable taming of Texas and the uncertain future of his legacy.
Kevin Murphy serves as executive producer/showrunner on the series, which has a 10-episode straight-to-series order.
Tom Harper ('War & Peace') is directing the opening episode of "The Son", which begins production this month in Austin for a 2017 premiere.