When Niels Christensen was born on 22 December 1807, in Prejlerup, Grevinge, Ods, Holbæk, Denmark, his father, Christen Hendrichsen, was 47 and his mother, Kirsten Andersdatter, was 34. He married Sidse Marie Johansdatter on 12 November 1831, in Gierslev, Holbæk, Denmark. They were the parents of at least 1 son and 2 daughters. He lived in Grevinge, Ods, Holbæk, Denmark in 1834 and Finderup, Løve, Holbæk, Denmark for about 10 years. He died on 7 April 1883, in Mink Creek, Bannock, Idaho, United States, at the age of 75, and was buried in Mink Creek, Bannock, Idaho, United States.