George Beals Schaller (born 1933) is an American mammalogist, biologist, conservationist and author. Schaller is recognized by many as the world's preeminent field biologist, studying wildlife throughout Africa, Asia and South America. Born in Berlin, Schaller grew up in Germany, but moved to Missouri as a teen. He is vice president of Panthera Corporation and serves as chairman of their Cat Advisory Council along with renowned conservationist and Panthera CEO Alan Rabinowitz. Schaller is also a senior conservationist at the Bronx Zoo-based Wildlife Conservation Society.

Schaller's work in conservation has resulted in the protection of large stretches of area in the Amazon, Brazil, the Hindu Kush in Pakistan, and forests in Southeast Asia. Due in part to Schaller's work, over 20 parks or preserves worldwide have been established, including Alaska's Arctic National Wildlife Refuge (ANWR), the Shey-Phoksundo National Park in Nepal, and the Changtang Nature Reserve in Tibet, one of the world's most significant wildlife refuges. At over 200,000 miles (320,000 km), the Chang Tang Nature Reserve was called "One of the most ambitious attempts to arrest the shrinkage of natural ecosystems," by The New York Times.