| Birth | Jul 1871 | Joseph Coolidge Kilbourne was born in Jul 1871 in Oregon. |
| Marriage | 1895 | He and Mildred Helm, daughter of Thomas Jefferson Helm and Mary Jane Lake, were married in 1895 in Santa Fe, Santa Fe County, New Mexico. |
1900 Census
| 1 Jun 1900 | Joseph appeared in the 1900 Federal Census of San Francisco, San Francisco County, California, as Joseph Rilbourne, in the household of Mary L. Miller, with his wife, Mildred and their children, Joseph and Thomas. |
| 1910 Census | 1910 | Joseph Coolidge Kilbourne appeared as head of household in the 1910 Federal Census of Columbus City, Franklin County, Ohio. Living with him was his wife, Mildred, and their children, Joseph and Thomas. |
| 1920 Census | 1920 | Joseph appeared in the 1920 Federal Census of Columbus City, Franklin County, Ohio, with his wife, Mildred. Their son, Thomas, was listed as living with them. |
Joseph Coolidge Kilbourne