Feargus O'Conner Bowden Squire (February 12, 1850 – July 21, 1932), often referred to as F. B. Squire, was an executive with the Standard Oil Company and former mayor of Wickliffe, Ohio. He is well known in the petroleum industry for introducing a number of innovations, such as the tanker truck and door-to-door delivery of refined oil, and for financing a breakthrough in the mining of sulfur.