Theresa, Martin and 7 children are enumerated in the 1900 census at Canton Twp., Bradford Co., Pennsylvania. She has been married 35 years and has given birth to 11 children, of which 8 are still living. The birthplace of her parents is Germany. Her immigration year is 1874. Martin's occupation is Farmer and the Drost property is mortgaged. The 1900 census data follows:
Martin Drost Head M 62 Germany
Theresa Drost Wife F 52 Germany
Edward Drost Son M 25 PA
Martha Drost Dau F 20 PA
John Drost Son M 18 PA
Katy Drost Dau F 16 PA
Maggie Drost Dau F 14 PA
Jerry Drost Son M 11 PA
Josephine Drost Dau F 28 PA

Theresa, Martin and 5 children are enumerated in the 1910 census at Canton, Bradford County. Her birthplace is Germany-Polish and the birthplace of her parents is Germany-Polish. She has been married one time, circa 1870. She and Martin own their home free of mortgage. The 1910 census data follows:
Martin Drost Head M 71 Germany-Polish
Theresa Drost Wife F 60 Germany
Josephine Drost Daughter F 37 PA
Edward J Drost Son M 36 PA
John Drost Son M 28 PA
Catherine Drost Daughter F 25 PA
Jeremiah Drost Son M 21 PA

Husband Martin died in 1915, aged about 77 years.

Teresa is enumerated as head of household in the 1920 census at Canton, Bradford County. Her marital status is Widowed. She has given birth to 11 children and 8 children are still living. Her immigration year is 1858 [sic] and she is a Naturalized citizen. She owns her home. No occupation is listed for her. The birthplace of her parents is Germany. The 1920 census data follows:
Teresa Drost Head F 70 Strausburg Germany
Edward J Drost Son M 44 PA
Martha Drost Daughter F 39 PA
John Drost Son M 37 PA
Kathryn Drost Daughter F 35 PA

Theresa died aged about 76 years.

Four of Theresa's children are enumerated in the 1930 census at Canton. The 1930 census data follows:
Edward J Drost Head M 56 PA
John Drost Brother M 48 PA
Martha E Drost Sister F 50 PA
Katherine T Drost Sister F 46 PA