Carl August Heinrich Ferdinand Oesterley (January 23, 1839 – December 16, 1930) was a German landscape painter who eventually specialized in scenes from Norway.
Beginning 1857, he attended the Kunstakademie (Art Academy) in Düsseldorf, where he studied painting under Ernst Deger and Eduard Bendemann.
During a visit to Lübeck in 1865, where he copied Hans Memling's Passion, he made some attempts at architectural and landscape painting.
Beginning in 1870 he focused his artistic efforts mainly on Norwegian landscapes, for which he devoted several study trips.
He lived in Hamburg and received a first-class medal from the Münchener Ausstellung (Munich Exhibition).