Lawrence W. Fertig (1898 – 1986) was an American advertising executive and a libertarian journalist and economic commentator.

Fertig wrote columns for the New York World-Telegram and the New York Sun. Fertig also wrote Prosperity Through Freedom.

He was the founder of Lawrence Fertig & Company, a New York advertising and marketing firm. The Hoover Institution maintains an archive of Fertig's papers at their Stanford, California location.