MC
Mary Chapman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Chapman across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1907), then head of a 10-person household.
Age 33
b. ~1907
Female
Spouse
Born: Alabama
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Chapman |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Alabama |
| 1935 Residence (City) | City of Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same Place |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
| Township / Ward | City Of Chicago |
| Est. Birth Year | ~1907 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Addie Chapman | Daughter | — | 12 | ~1928 |
| Laura Chapman | Daughter | — | ~1940 | |
| Mary Chapman | Daughter | — | 6 | ~1934 |
| Elouise Chapman | Daughter | — | 10 | ~1930 |
| Monie Chapman | Daughter | — | 14 | ~1926 |
| William Chapman | Head | — | 34 | ~1906 |
| David Chapman | Son | — | 8 | ~1932 |
| Morris Chapman | Son | — | 2 | ~1938 |
| William Chapman | Son | — | 3 | ~1937 |
| Mary Chapman | Spouse | — | 33 | ~1907 |
Census Appearances
1930
Cook, Illinois
Spouse, age 25
Cook, Illinois · implied b. ~1905 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Occupation | none |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1940
Cook-County, Illinois
Spouse, age 33
Cook-County, Illinois · implied b. ~1907 — 10 household members
| Surname | Chapman |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Alabama |
| 1935 Residence (City) | City of Chicago |
| 1935 Residence (County) | Cook |
| Highest Grade | No 6 |
| 1935 Residence | Same Place |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
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 Mary Chapman across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Chapman
Spouse · 1940 · age 33 · b. ~1907 · Illinois
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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-t0627-00977-00804)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Andrew Adams | 64 | Head | Janitor | Mississippi |
| 42 | Nora Adams | 59 | Wife | — | Kentucky |
| 43 | Jessie Muller | 57 | Head | Porter | Mississippi |
| 44 | Betty Muller | 33 | Wife | — | Mississippi |
| 45 | Bernice Washington | 40 | Lodger | Porter | Mississippi |
| 46 | Charles Huston | 36 | Head | — | Alabama |
| 47 | James Huston | 9 | Son | — | Illinois |
| 48 | Ted Andrews | 35 | Head | Laborer | Louisiana |
| 49 | Bessie Franks | 24 | Boarder | Packer | Illinois |
| 50 | William Johnson | 40 | Boarder | Cement Helper | Alabama |
| 51 | William Chapman | 34 | Head | Laborer | Alabama |
| 52 | Mary Chapman THIS PERSON | 33 | Wife | — | Alabama |
| 53 | Monie Chapman | 14 | Daughter | — | Alabama |
| 54 | Addie B. Chapman | 12 | Daughter | — | Alabama |
| 55 | Elouise Chapman | 10 | Daughter | — | Illinois |
| 56 | David Chapman | 8 | Son | — | Illinois |
| 57 | Mary Chapman | 6 | Daughter | — | Illinois |
| 58 | William Chapman | 3 | Son | — | Illinois |
| 59 | Morris Chapman | 2 | Son | — | Illinois |
| 60 | Laura Chapman | 0 | Daughter | — | Illinois |
| 61 | Charles Anderson | 29 | Head | Janitor | Georgia |
| 62 | Helen Anderson | 25 | Wife | — | Georgia |
| 63 | Marietta Anderson | 7 | Daughter | — | Illinois |
| 64 | Charles Jr. Anderson | 4 | Son | — | Illinois |
| 65 | Elaine Anderson | 2 | Daughter | — | Illinois |
| 66 | Robert Anderson | 2 | Son | — | Illinois |
| 67 | Peter T. Anderson | 0 | Son | — | Illinois |
| 68 | Anna Anderson | 73 | Mother | — | Georgia |
| 69 | Joseph Anderson | 14 | Nephew | — | Georgia |
| 70 | Anna Jones | 21 | Niece | — | Georgia |
| 71 | Eleanore White | 26 | Head | — | Georgia |
| 72 | Frank White | 9 | Son | — | Illinois |
| 73 | Geraldine White | 7 | Daughter | — | Illinois |
| 74 | Allene White | 4 | Daughter | — | Illinois |
| 75 | Jeanette White | 2 | Daughter | — | Illinois |
| 76 | Nora Cook | 44 | Head | Seamstress | Tennessee |
| 77 | Vera Cook | 10 | Daughter | — | Illinois |
| 78 | Annie Anderson | 42 | Head | — | Georgia |
| 79 | Boiey Brown | 29 | Head | — | Mississippi |
| 80 | Anna Brown | 27 | Wife | — | Mississippi |
Related Census Records
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)