Jonas Helmer Osslund, originally Åslund (22 September 1866, in Tuna Parish, Medelpad – 11 July 1938, in Stockholm) was a Swedish painter.
He changed his name from Åslund to Osslund when he lived in America, to make the correct pronunciation more obvious.
After his basic education, he attended the Umeå högre allmänna läroverk [sv] (secondary school), then moved to the United States to study engineering.
He also absorbed Symbolism from lessons from Paul Gauguin and worked with Jens Ferdinand Willumsen.
On arriving, his friend, Georg J:son Karlin, found employment for him at Höganäs AB.
Three of his paintings were purchased by the leather manufacturer (later Consul) Emil Matton (1866–1957), whose sister Ida was a well known sculptor.