Like its predecessor After Man, The New Dinosaurs garnered positive reviews from critics. William F. Allman, writing for the U.S. News and World Report, praised the fact that Dixon had extrapolated his designs from real dinosaur ancestors and concluded that although whimsical at times, most dinosaur researchers would agree with the book insofar that had the asteroid that brought their extinction not hit the planet, dinosaurs would probably dominate the planet to this day. Reviews in Smithsonian, School Library Journal and Booklist were also positive, with reviewers calling the book an "alternative history of the world" and a "quintessential 'what if' book for dinosaur enthusiasts".[8]