AP
Andrew Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Andrew Peterson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Albert & Albert — first a son (b.~1919), then head of a 4-person household.
Age 21
b. ~1919
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Peterson |
| Given Name | Andrew M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1919 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Andrew | Age | Birth yr |
|---|---|---|---|---|
| Virginia Peterson | Daughter | — | 19 | ~1921 |
| Albert Peterson | Head | — | 46 | ~1894 |
| Andrew Peterson | Son | — | 21 | ~1919 |
| Francis Peterson | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Cook, Illinois
Son, age 1
Cook, Illinois · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Andrew |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 11
Cook, Illinois · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Andrew |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 21
Cook-County, Illinois · implied b. ~1919 — 4 household members
| Surname | Peterson |
| Given Name | Andrew M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Class of Worker | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Andrew Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Albert Peterson (~0.92 confidence) and father Albert Peterson (~0.92 confidence) and father Albert Peterson (~0.92 confidence) and mother Francis Peterson (~0.92 confidence) and mother Francis Peterson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Albert Peterson
b. ~1894
Source father
● Household
· direct · ~0.92
Father
Albert Peterson
b. ~1894
Source father
● Household
· direct · ~0.92
Father
Albert Peterson
b. ~1894
Source father
● Household
· direct · ~0.92
Mother
Francis Peterson
b. ~1895
Source mother
● Household
· direct · ~0.92
Mother
Francis Peterson
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Andrew Peterson
Son · 1940 · age 21 · b. ~1919 · Illinois
★ You are viewing this record
Sibling
Virginia Peterson
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00949-00089)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anna Mae Ryder | 5 | Daughter | — | — |
| 2 | Peter D. Walther | 65 | Head | Plumber | Illinois |
| 3 | Anna K. Walther | 61 | Wife | — | Iowa |
| 4 | Genevieve L. Walther | 34 | Daughter | Typist | Illinois |
| 5 | Lawrence J. Walther | 20 | Son | Typist | Illinois |
| 6 | Elizabeth Schaeffer | 86 | Mother-in-law | — | Illinois |
| 7 | Herbert J. Crawford | 29 | Head | Usher | Illinois |
| 8 | Ellen M. Crawford | 26 | Wife | — | Illinois |
| 9 | Robert J. Crawford | 3 | Son | — | — |
| 10 | John Baldasty | 37 | Head | Baker | Austria |
| 11 | Anna Baldasty | 34 | Wife | — | Austria |
| 12 | Albert J. Baldasty | 14 | Son | — | Illinois |
| 13 | Helen Baldasty | 10 | Daughter | — | Illinois |
| 14 | Arthur F. Christiansen | 56 | Head | Painter | Sweden |
| 15 | Ephraim M. Nelson | 37 | Head | Oil Burner Repair | Iowa |
| 16 | Violet Nelson | 37 | Wife | — | Illinois |
| 17 | George P. Johnson | 60 | Head | Shipping Clerk | Illinois |
| 18 | Hattie Johnson | 50 | Wife | — | Illinois |
| 19 | George Jr. Johnson | 13 | Son | — | Illinois |
| 20 | James D. Foley | 50 | Head | Time Clerk | Illinois |
| 21 | Francis E. Foley | 42 | Wife | — | New Jersey |
| 22 | Anna Mae Foley | 20 | Daughter | Sales Clerk | Illinois |
| 23 | John J. Foley | 18 | Son | New Worker | Illinois |
| 24 | James D. Jr. Foley | 15 | Son | — | Illinois |
| 25 | Frances M. Foley | 11 | Daughter | — | Illinois |
| 26 | Thomas J. Foley | 0 | Son | — | — |
| 27 | Elizabeth Foley | 74 | Mother | — | D.C. |
| 28 | Dominick J. Morley | 57 | Head | Laborer | Free State of Ireland |
| 29 | Catherine Morley | 56 | Wife | — | Free State of Ireland |
| 30 | Martin Connolly | 65 | Lodger | — | Free State of Ireland |
| 31 | Victor Gustafson | 62 | Head | — | Sweden |
| 32 | Hilda Gustafson | 67 | Wife | — | Sweden |
| 33 | Frank P. Wood | 50 | Head | Elev. Operator | Indiana |
| 34 | Grace M. Wood | 50 | Wife | — | Illinois |
| 35 | Kenneth C. Wood | 25 | Son | Truck Driver | Illinois |
| 36 | Lillian Wood | 23 | Daughter-in-law | — | New York |
| 37 | Albert A. Peterson | 46 | Head | Electrician Car Shop | Illinois |
| 38 | Francis P. Peterson | 45 | Wife | Assembler | Illinois |
| 39 | Andrew M. Peterson THIS PERSON | 21 | Son | — | Illinois |
| 40 | Virginia Peterson | 19 | Daughter | — | Illinois |
Pedigree Summary
Andrew + 1 sibling
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)