| Possible Birthdate | Sep 1863 | According to at least one source, his birthdate was Sep 1863 birthplace was Missouri. |
| Birth | 12 Sep 1864 | Edward C. Heinlein was born on 12 Sep 1864 in Hermann, Gasconade County, Missouri. |
| Marriage | about 1886 | He and Anna Maria Gumper, daughter of David Gumper and Walburga Reichle, were married about 1886. |
| 1900 Census | 12 Jun 1900 | Edward C. Heinlein appeared as head of household in the 1900 Federal Census of Boeuf Township, Gasconade County, Missouri, as Edwin Heinlein. Living with him was his wife, Anna, and their children, Bertha, Arnold, Minnie and Albert. He is a married white male, age 36. Born September 1863. Married 13 years. He was born in Missouri. His mother and father were born in Germany. His occupation is farmer. He was unemployed 0 months. He can read, write and speak English. He owns his home. It is mortgaged. It is a farm, number 92 on the farm schedule. |
| 1910 Census | 15 Apr 1910 | Edward C. Heinlein appeared as head of household in the 1910 Federal Census of Boeuf Township, Gasconade County, Missouri, as Edward Heinlein. Living with him was his wife, Anna, and their children, Arnold, Minnie, Albert and Benjamin, as well as Edmund C. Doll. He is a married white male, age 46. Married 24 years. He was born in Missouri. His mother and father were born in Germany. He can speak English. His occupation is farmer on a general farm. He is an employer. He can read and write. He owns his home, it is mortgaged. It is a farm. Number 2 on the farm schedule. |
| 1920 Census | 16 Jan 1920 | Edward C. Heinlein appeared as head of household in the 1920 Federal Census of Boeuf Township, Gasconade County, Missouri. Living with him was his wife, Anna, and their children, Benjamin and Arnold Edward Heinlein, as well as his daughter-in-law, Ida Meyer. |
| Death | 20 Jun 1922 | Edward C. Heinlein died on 20 Jun 1922 in St. Louis, Missouri, at age 57. Cause of death: cancer of stomach.  |
| Burial | 22 Jun 1922 | He was buried on 22 Jun 1922, age 57, in Saint James Cemetery, located in Stony Hill, Franklin County, Missouri. |
Edward C. Heinlein