HP
Harry Peterson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Harry Peterson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 4-person household.
Age 47
b. ~1893
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Peterson |
| Given Name | Harry |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | electrical operator |
| Industry | sanitary district city of Chicago |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 468 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Electrical Operator |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1893 |
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 Harry | Age | Birth yr |
|---|---|---|---|---|
| Harold Peterson | Son | — | 19 | ~1921 |
| Elizabeth Peterson | Spouse | — | 46 | ~1894 |
| Harry Peterson | Head | — | 47 | ~1893 |
| Dorothy Peterson | Daughter | — | 16 | ~1924 |
Census Appearances
1920
Cook, Illinois
Other, age 27
Cook, Illinois · implied b. ~1893 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Petersen |
| Given Name | Harry |
| Relationship to Head | Son-in-law |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Electrician |
| Industry | City |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Other, age 37
Cook, Illinois · implied b. ~1893 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Petersen |
| Given Name | Harry |
| Relationship to Head | son-in-law |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 27 |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Electrician |
| Industry | Sanitary District |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | Yes W.W. |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 47
Cook-County, Illinois · implied b. ~1893 — 4 household members
| Surname | Peterson |
| Given Name | Harry |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | electrical operator |
| Industry | sanitary district city of Chicago |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 468 |
| Highest Grade | H-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 Harry Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Harry Peterson
Head · 1940 · age 47 · b. ~1893 · Illinois
★ You are viewing this record
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-t0627-00999-00384)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Benjamin Simon | 25 | Daughter | Registered Nurse | Illinois |
| 42 | Mildred Simon | 19 | Daughter | Stock Clerk | Illinois |
| 43 | Joseph Kasalley | 59 | Boarder | Maintenance Man | Pennsylvania |
| 44 | Samuel Maas | 70 | Head | — | Germany |
| 45 | Elizabeth Maas | 65 | Wife | — | Germany |
| 46 | Helen Maas | 25 | Daughter | Sales Clerk | Illinois |
| 47 | Marie Maas | 39 | Niece | Clerk | Illinois |
| 48 | Esther Lieberman | 23 | Daughter | Stenographer | Illinois |
| 49 | Meyer Lieberman | 20 | Son | Truck Helper | Illinois |
| 50 | William Bender | 40 | Head | Mail Carrier | Illinois |
| 51 | Agnes Bender | 40 | Wife | Clerk | Illinois |
| 52 | William Jr. Bender | 11 | Son | — | Illinois |
| 53 | Myrna Bender | 8 | Daughter | — | Illinois |
| 54 | Louise Bender | 65 | Mother | — | Illinois |
| 55 | Charles Essig | 63 | Head | — | Illinois |
| 56 | Carrie Essig | 62 | Wife | — | Illinois |
| 57 | Charlotte Pelzer | 42 | Daughter | — | Illinois |
| 58 | Jack Pelzer | 18 | Grandson | New Worker | Illinois |
| 59 | Sam Burns | 47 | Head | Foreman | Michigan |
| 60 | Bernice Burns | 41 | Wife | — | Michigan |
| 61 | Robert Burns | 21 | Son | Shipping Clerk | Michigan |
| 62 | Constance Burns | 18 | Daughter | New Worker | Michigan |
| 63 | William Burns | 16 | Son | — | Michigan |
| 64 | Jack Burns | 11 | Son | — | Michigan |
| 65 | Leroy Holmberg | 48 | Head | Assistant Foreman | Illinois |
| 66 | Florence Holmberg | 45 | Wife | — | New Jersey |
| 67 | Leroy Jr. Holmberg | 22 | Son | Machinist | Illinois |
| 68 | Harry Peterson THIS PERSON | 47 | Head | Electrical Operator | Illinois |
| 69 | Elizabeth Peterson | 46 | Wife | — | Illinois |
| 70 | Harold Peterson | 19 | Son | Mail Clerk | Illinois |
| 71 | Dorothy Peterson | 16 | Daughter | — | Illinois |
| 72 | Fred Rumpf | 48 | Head | Barber | Illinois |
| 73 | Anna Rumpf | 45 | Wife | — | Illinois |
| 74 | Virginia Rumpf | 16 | Daughter | — | Illinois |
| 75 | Edward Drogosch | 38 | Head | Chauffeur | Illinois |
| 76 | Margaret Drogosch | 38 | Wife | — | Illinois |
| 77 | Frank Ross | 40 | Head | Traffic Super | Illinois |
| 78 | Gertrude Ross | 36 | Wife | — | Iowa |
| 79 | John Ross | 7 | Son | — | Illinois |
| 80 | Frank Jr. Ross | 5 | Son | — | Illinois |
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)