When Lars Larsen was born on 10 August 1814, in Torup, Frederiksborg, Denmark, his father, Lars Nielsen, was 41 and his mother, Kirsten Andersdatter, was 39. He married Margrethe Pedersen on 29 April 1843, in Melby, Frederiksborg, Denmark. They were the parents of at least 3 sons and 8 daughters. He lived in Melby, Strø, Frederiksborg, Denmark for about 20 years. He died on 20 April 1870, at the age of 55, and was buried in Melby, Frederiksborg, Denmark.