Denison Bollay (born 1952) is a software engineer working on programming languages and search algorithms, with applications for e-commerce and financial information.

In 1975, Bollay became an early quant (before the term was invented), computing real-time option pricing.

Bollay is the author of ExperLogo and ExperLisp, the first incrementally compiled object-oriented programming languages for a personal computer, the Apple Macintosh.

He is also one of the authors (with Mel Beckman and Brian Fox) of the BuddyCast peer-to-peer streaming media protocol.

It was featured on the front page of The Wall Street Journal, launching a trend that encouraged thousands of children to become interested in software.