James Weller Ladbroke (died 16 March 1847) was a nineteenth-century landowner and the principal developer of the Ladbroke Estate, a substantial parcel of land in Notting Hill, London, England.[1] Many streets in Notting Hill still bear the Ladbroke name today, including Ladbroke Grove and Ladbroke Square, and the former Ladbroke Estate is now a conservation area.