Walter Emil Friedrich August Migula (* 1863 in Zyrowa (Oberschlesien, Gmina Zdzieszowice); † 1938 in Eisenach) was a German botanist, who published many articles on the subjects of cryptogamic botany, bacteriology, and plant physiology. He is best remembered for his Kryptogamen-Flora von Deutschland, Deutsch-Österreich und der Schweiz (Cryptogamic Flora of Germany, Austria, and Switzerland) and for describing the proteobacterial genus Pseudomonas.