b. 3 February 1877, d. 12 January 1920
| Birth | 3 February 1877 | William Henry Larsen was born on 3 February 1877 in Stoddard County, Missouri. |
| Cen-Head
(Enumerated with) | 21 June 1880 | The 1880 US Census listed William Henry Larsen in addition to Louisa Edwards, James Preston Larsen, John Christian Larsen and Alnestena Larsen in the household of Martin Luther Larsen, in Castor Township, Stoddard County, Missouri. |
| Cen-Enum | 21 June 1880 | William Henry Larsen was enumerated as William Henry Lawson. Single white male, age 3. Son of head of household. He was born in Missouri. His father was born in Denmark, his mother in Tennessee. |
| Marriage | 31 May 1896 | He and Effie Louise Timmons, daughter of Garret Timmons and Nancy (unknown), were married on 31 May 1896 in Stoddard County, Missouri. |
| Cen-Head | 12 June 1900 | William Henry Larsen is head of household in the 1900 US Census of Castor Township, Stoddard County, Missouri as Henry W. Larsen. Married white male, age 23. Born February 1877. Married 4 years. He was born in Missouri. His father was born in Denmark, his mother in Missouri. His occupation is farmer. He can read, write and speak English. He owns his farm, free of mortgage. It is number 96 on the farm schedule. Enumerated with William Henry Larsen was Edgar M. Larsen, Leslie Larsen and Effie Louise Timmons. |
| Cen-Head | 5 May 1910 | William Henry Larsen is head of household in the 1910 US Census of Castor Township, Stoddard County, Missouri as William H. Larsen. Married white male, age 33. Married 13 years. He was born in Missouri. His father was born in Denmark, his mother in Tennessee. He can speak English. His occupation is farmer on his own farm. He works on his own account. He was not out of work on April 10, 1910. He can read and write. He owns his home. It is mortgaged. It is a farm, number 180 on the farm schedule. Enumerated with William Henry Larsen was Effie Louise Timmons, Edgar M. Larsen, Leslie Larsen and Charles W. Larsen. |
| Death | 12 January 1920 | William Henry Larsen died on 12 January 1920 in Stoddard County, Missouri, at age 42. |
| Burial | | He was buried in West Antioch Cemetery, Stoddard County, Missouri. |