Johan Ångström (24 September 1813, Lögdö, Medelpad – 19 January 1879, Örnsköldsvik) was a Swedish medical doctor and bryologist. He obtained his education in Uppsala, and later practiced medicine in the communities of Lycksele and Örnsköldsvik. With Fredrik Nylander (1820-1880), he conducted botanical investigations in Lapland, Finland and Karelia. The moss genus Aongstroemia (Bruch & Schimp., 1846) in named in his honor. As a taxonomist, he was the binomial authority of several plants within the genus Botrychium.
Selected works Dispositio muscorum in Scandinavia : hucusque cognitorum, 1842. Symbolae ad Bryologiam Scandinavicam, 1844. Primae lineae muscorum cognoscendorum, 1876.
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