Extract from the 1920 Census:
Name: Katherine Cassioppi
Age: 13
Estimated birth year: 1907
Birthplace: Illinois
Race: white
Sex: female
Relationship to head of house: daughter
Home in 1920: Rockford, Winnebago, Illinois
Address: 525 Kent Street
Marital status: single
Attended school since 1 Sep 1919: yes
Able to speak English: yes
Able to read and write: yes
Father's birthplace: Italy
Father's native tongue: Italian
Mother's birthplace: Italy
Mother's native tongue: Italian
Occupation: attending school
Siblings living at home: Mary (age 17), Frank (11), Katie (7), Lena (5), Mamie (4 10/12), and Nellie (2 7/12)
Census place: Rockford Ward 5, Winnebago, Illinois; Roll: T625_417; Page: 7B; Enumeration District: 200; Image: 485
Date: 9 Jan 1920

Extract from the 1930 Census:
Name: Katherine Cassioppi
Age: 23
Estimated birth year: 1907
Birthplace: Illinois
Race: white
Sex: female
Relation to head-of-house: daughter
Home in 1930: Rockford, Winnebago, Illinois
Address: 1223 South Winnebago Street
Marital status: single
Education: able to speak English
Education: able to read and write
Fathers' birthplace: Italy
Mothers' birthplace: Italy
Occupation: loafer [?]
Industry: knitting shop
Salary or wage worker: wages
Siblings living at home: Frank (age 22), Kate (18), Lena (16), Mamie (14), Nellie (12), and Benny (8)
Census place: Rockford, Winnebago, Illinois; Roll: 571; Page: ; Enumeration District: 37; Image: 820.0
Date: 10 Apr 1930

Extract from the 1940 Census:
Name: Katherine Maggio
Age: 34
Estimated birth year: 1906
Birthplace: Illinois
Race: white
Sex: female
Relation to head-of-house: wife
Home in 1940: Rockford, Winnebago, Illinois
Address: 618 Loomis Street
Marital status: married
Highest grade of school completed: 8
Living on farm: no
City of residence in 1935: Rockford, Winnebago, Illinois
Resident on farm in 1935: no
Occupation: housework
Has other income of more than $50: no
Census place: Rockford, Winnebago, Illinois; Roll: T627_913; Page: 19B; Enumeration District: 101-38
Date: 29 Apr 1940

Extract from the 1950 Census:
Name: Kathryn Maggio
Age: 42
Estimated birth year: 1908
Birthplace: Illinois
Race: white
Sex: female
Relation to head-of-house: wife
Home in 1950: Rockford, Winnebago, Illinois
Address: 951 Rockton Avenue
Marital status: married
Living on farm: no
Occupation: assembling
Industry: cabinet hardware
At work during last week: yes
Number of hours worked: 40
Class of worker: for private employer
Census place: Rockford, Winnebago, Illinois
Date: 12 Apr 1950

She was employed by Amerock Corporation (Rockford, Illinois) for 25 years. Member of Saint Bernadette Catholic Church of Rockford, Illinois.

Children:
(1) Angeline Marie Maggio
(2) Samuel James Maggio
(3) Marian Monica Maggio
(4) Jerry James Maggio.