Crispin Porter + Bogusky (also known as CP+B), a member of publicly traded MDC Partners, is an advertising agency that currently employs around 700 people. It was founded in 1988 by Sam Crispin. Crispin then became partners with Chuck Porter and Alex Bogusky. As of 2016, Porter is the only member still working for CP+B.

The agency is headquartered in Boulder, Colorado with additional offices in Coconut Grove, Florida, Los Angeles, California, London, England, Sao Paolo, Brazil, Gothenberg, Sweden, Stockholm, Sweden, Copenhagen, Denmark, and Hong Kong, China. CP+B Europe[5] opened its doors in June, 2009 after acquiring Swedish agency Daddy, based in Gothenburg, Sweden. Mark Simmons (author) was Managing Director of its Los Angeles office from 2002 to 2004. In July, 2010 CP+B Canada opened after acquiring the Toronto-based agency Zig.