Sarah Martha Baker D.Sc. FLS (an haife ta a shekara ta 1887-ta mutu a shekara ta 1917) ta kasance ƙwararren masanin ilmin tsirrai na Ingilishi kuma masanin yanayin ƙasa wanda aka tuna da ita game da karatunta na ruwan ciyawar ruwan kasa da tsarin yanki a gabar teku. An haife ta a Landan ranar 4 ga watan Yunin shekara ta 1887, ta kasance 'yar Martha Braithwaite Baker da George Samuel Baker kuma ta girma a cikin dangin Quaker tare da kanne biyu, George da Bevan. Kazalika babban gidansu na London dangin suna da gidan ƙasa a Tsibirin Mersea inda Baker ya fara sha'awar tsiren ruwan teku . An ce tana da sha'awar shuke-shuke da furanni tun tana ƙarama. Wani sha'awar shine fasaha kuma tayi karatun taƙaice a Slade School of Art kafin ta koma kimiyya. Wannan horarwar fasaha ta haifar da samar da kwatancin kimiyya mai inganci. Baker ta fara karatu a kwalejin jami'a ta Landan a shekara ta 1906, inda daya daga cikin malamanta shine mai ilmin kimiyar magani Sir William Ramsay, kuma ta sami digiri na farko na Kimiyya tare da karramawa ta farko a shekara ta 1909.