[1] [2] Osmund Andersen Lømsland was born at the village of Mosby in Oddernes, a borough in Kristiansand, Norway.
In 1806, he bought the farm Lømsland at Tveit in Vest-Agder where he remained throughout his life.
About 1790, Osmund Andersen was married with Anna Torstensdatter Lauvsland from the parish of Finsland (1766–1837).
The couple had seven children born in the period 1790–1803, of whom only three lived into adulthood.
At the Assembly, he supported the union party (Unionspartiet).