Baylis may refer to: Places Baylis, Illinois, a village in Pike County, Illinois, United States Baylis, Slough, a place in the English county of Berkshire Baylis, the seat of Alexander Wedderburn, 1st Earl of Rosslyn near Salt Hill, Windsor where he died in 1805 Baylis Road, a road in Lambeth, London, England Baylis & Harding, the handwash company based in Redditch, England Baylis Street, one of the main shopping streets in Wagga Wagga, New South Wales, Australia Baylis Court School, a girls' school in Slough, Berkshire, England Other uses Baylis (surname) Baylis–Hillman reaction, a reaction of an aldehyde and an α,β-unsaturated electron-withdrawing group catalyzed by DABCO (1,4-diazabicyclo[2.2.2]octane) to give an allylic alcohol Aza-Baylis–Hillman reaction, the reaction of an α,β-unsaturated carbonyl compound with an imine in the presence of a nucleophile See also Bayless, a surname Bayliss, a surname