Robert G. Grant (born 1936) is an American political activist, and the former leader of several Christian right groups in the United States.
Concerned about what he saw as moral decay in America, Grant founded American Christian Cause in Southern California in 1974 to fight against pornography and homosexual rights.
Grant involved national conservative leaders in his movement, including Gary Jarmin, Howard Phillips, Terry Dolan, and Richard Viguerie.
Christian Voice-backed candidates, including Ronald Reagan, Steve Symms, Dan Quayle, and John Porter East, defeated incumbents in the 1978 and 1980 elections.
After Phillips, Dolan, and Viguerie left several years later, they and Jerry Falwell formed a new Christian right organization, the Moral Majority.