John Forester (born 1929) is an American industrial engineer specializing in bicycle transportation engineering.
A noted cycling activist, he is known as "the father of vehicular cycling", for creating the Effective Cycling program of bicycle training along with its associated book of the same title, and for coining the phrase he calls the "vehicular cycling principle": "Cyclists fare best when they act and are treated as drivers of vehicles".
His published works also include Bicycle Transportation: A Handbook for Cycling Transportation Engineers.