b. January 1870
| Birth | January 1870 | Mary Dolan was born in January 1870 in Missouri. |
| Cen-Head
(Enumerated with) | 5 July 1870 | The 1870 US Census listed Mary Dolan in addition to Mary McDaniels, Peter Dolan and Eugene Dolan in the household of Christopher Dolan, in Subdivision 19, 11th Ward St. Louis, St. Louis County, Missouri. |
| Cen-Enum | 5 July 1870 | Mary Dolan was enumerated as Mary Dolan. 5/12 years old. Born in Missouri. Father and mother are of foreign birth. Born in January of the census year. |
| Cen-Head
(Enumerated with) | 7 June 1880 | The 1880 US Census listed Mary Dolan in addition to Mary McDaniels, Peter Dolan, Eugene Dolan, George Dolan and Lillie Dolan in the household of Christopher Dolan, in St. Louis City, Missouri. |
| Cen-Enum | 7 June 1880 | Mary Dolan was enumerated as Mary Dolan. Lives at 811 Mallinakradt Street. White female, age 9. Daughter of head of household. At school. Born in Missouri. Her father was born in Ireland, mother in Missouri. |
| Cen-Head
(Enumerated with) | 15 November 1880 | The 1880 US Census listed Mary Dolan in addition to Mary McDaniels, Peter Dolan, Eugene Dolan, George Dolan and Lillie Dolan in the household of Christopher Dolan, in St. Louis City, Missouri. |
| Cen-Enum | 15 November 1880 | Mary Dolan was enumerated as Mary Dolan. Lives at 811 Malinkrodt. Single, white female, age 10. Daughter of head of household. At school. Born in Missouri. Mother and father were born in Ireland. |