HC
Harry Clark — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Harry Clark across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1873), then head of a 4-person household.
Age 67
b. ~1873
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Clark |
| Given Name | Harry |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Collector & Solicitor |
| Industry | Gas & Light Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 371 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Collector & Solicitor |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1873 |
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 |
|---|---|---|---|---|
| Harriet Heather | Daughter | — | 40 | ~1900 |
| Shirley Heather | Daughter | — | 15 | ~1925 |
| Harry Clark | Head | — | 67 | ~1873 |
| Jennie Clark | Spouse | — | 62 | ~1878 |
Census Appearances
1920
Cook, Illinois
Head, age 47
Cook, Illinois · implied b. ~1873 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harry |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Teamster |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Head, age 57
Cook, Illinois · implied b. ~1873 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harry E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 45 |
| Father's Birthplace | New York |
| Mother's Birthplace | Kentucky |
| Occupation | Copper smith |
| Industry | Railroad repair |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Radio Set | R |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 67
Cook-County, Illinois · implied b. ~1873 — 4 household members
| Surname | Clark |
| Given Name | Harry |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Occupation | Collector & Solicitor |
| Industry | Gas & Light Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 371 |
| Highest Grade | No 8 |
| 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 Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Harry Clark
Head · 1940 · age 67 · b. ~1873 · 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-t0627-01004-00811)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Arnold Langlow|Langlow | 7 | Son | — | Illinois |
| 42 | Kenneth Langlow|Langlow | 5 | Son | — | Illinois |
| 43 | Robert Langlow|Langlow | 3 | Son | — | Illinois |
| 44 | Otto E Topel | 60 | Head | Musical Inst | Germany |
| 45 | Emma M Topel | 54 | Wife | Dressmaker | Germany |
| 46 | Evelyn Topel | 32 | Daughter | Clerk | Illinois |
| 47 | Robert Topel | 21 | Son | Shipping Clerk | Illinois |
| 48 | Ellen A Volberding | 58 | Head | Clerical | Illinois |
| 49 | Ann M Volberding | 27 | Wife | Engineer | Illinois |
| 50 | Elder Jr Volberding | 1 | Son | — | Illinois |
| 51 | Berntin C Tandrum | 70 | Head | — | Sweden |
| 52 | Jennie C Tandrum | 70 | Wife | — | Sweden |
| 53 | Gunnar Johnson | 43 | Head | Painter | Sweden |
| 54 | Ethel C Johnson | 43 | Wife | — | Illinois |
| 55 | Edwin J Kirchhoff | 46 | Head | Horticulturist | Illinois |
| 56 | Eleanor J Kirchhoff | 43 | Wife | — | Illinois |
| 57 | Richard Kirchhoff | 21 | Son | Factory | Illinois |
| 58 | Dorothy Kirchhoff | 17 | Daughter | Paper Girl | Illinois |
| 59 | Margaret Kirchhoff | 16 | Daughter | — | Illinois |
| 60 | Walter Tatge | 54 | Head | Captain | Illinois |
| 61 | Mina Tatge | 50 | Wife | — | Illinois |
| 62 | Grace Tatge | 26 | Daughter | Efficiency Stenographer | Illinois |
| 63 | Dorothy Tatge | 11 | Daughter | — | Illinois |
| 64 | John Matecki | 44 | Head | Clothing Cutter | Poland |
| 65 | Evelyn Matecki | 39 | Wife | Dress Finisher | Poland |
| 66 | Edward Matecki | 19 | Son | — | Illinois |
| 67 | Harry Clark THIS PERSON | 67 | Head | Collector & Solicitor | Illinois |
| 68 | Jennie Clark | 62 | Wife | — | Iowa |
| 69 | Harriet M Heather | 40 | Daughter | Hotel Maid | Iowa |
| 70 | Shirley Jane Heather | 15 | Daughter | — | Illinois |
| 71 | Clara W Hatcher | 41 | Head | — | Illinois |
| 72 | Harold F Hatcher | 18 | Son | Laborer | Illinois |
| 73 | Eleanor J Hatcher | 16 | Daughter | — | Illinois |
| 74 | Lorraine A Hatcher | 14 | Daughter | — | Illinois |
| 75 | Louie Hiebig | 52 | Sister | — | Illinois |
| 76 | Helmer Lund | 42 | Head | Street Car Conductor | Illinois |
| 77 | Martha Lund | 40 | Wife | — | Illinois |
| 78 | Robert Lund | 17 | Son | — | Illinois |
| 79 | Herbert Lund | 12 | Son | — | Illinois |
| 80 | James Lund | 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)