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John Mullen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Mullen across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 8-person household.
Age 12
b. ~1928
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Mullen |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1928 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Patricia Mullen | Daughter | — | 3 | ~1937 |
| Mary Mullen | Daughter | — | 14 | ~1926 |
| Eileen Mullen | Daughter | — | 6 | ~1934 |
| Patrick Mullen | Head | — | 47 | ~1893 |
| John Mullen | Son | — | 12 | ~1928 |
| Raymond Mullen | Son | — | 9 | ~1931 |
| James Mullen | Son | — | 16 | ~1924 |
| Anne Mullen | Spouse | — | 39 | ~1901 |
Census Appearances
1930
Cook, Illinois
Son, age 1
Cook, Illinois · implied b. ~1929 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mullen |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Wisconsin |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 12
Cook-County, Illinois · implied b. ~1928 — 8 household members
| Surname | Mullen |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Highest Grade | No 5 |
| 1935 Residence | Same House |
| 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 John Mullen across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mullen
Son · 1940 · age 12 · b. ~1928 · Illinois
★ You are viewing this record
Sibling
James Mullen
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Mullen
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Mullen
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mullen
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eileen Mullen
Sibling · 1940 · age 6
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
39 people indexed on this census page (nara:1940:m-t0627-00952-00108)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Harry M Toopley | 74 | Head | Clerk | Canada Eng |
| 2 | Annie S Toopley | 69 | Wife | Clerk | Nebraska |
| 3 | Clarence Higgins | 40 | Lodger | Machinist | Indiana |
| 4 | Muriel Higgins | 42 | Lodger | Saleslady | Illinois |
| 5 | Joy Higgins | 13 | Lodger | — | Illinois |
| 7 | Robert Silver | 58 | Head | Machinist | Illinois |
| 8 | Elizabeth Silver | 58 | Wife | — | Iowa |
| 9 | George Kallaway | 54 | Lodger | Bartender | Maryland |
| 10 | Frank Reading | 38 | Head | Layout Man | Pennsylvania |
| 11 | Helen Reading | 36 | Wife | — | Illinois |
| 12 | Lawrence Reading | 15 | Son | — | Illinois |
| 13 | Harold Reading | 13 | Son | — | Illinois |
| 14 | Joan Reading | 7 | Daughter | — | Illinois |
| 15 | Anna Schroeder | 70 | Mother in law | — | Illinois |
| 16 | Thomas Braniff | 57 | Lodger | — | Nebraska |
| 17 | Theodore Niedenhof | 63 | Lodger | Cutter | Germany |
| 18 | Andrew Maguire | 35 | Head | Laborer | Virginia |
| 19 | Caroline Maguire | 32 | Wife | Clerk | Pennsylvania |
| 20 | Jesse Spindie | 36 | Head | Wood-Worker | New York |
| 21 | Dorothy Spindie | 28 | Wife | — | Illinois |
| 22 | Dolores Spindie | 8 | Daughter | — | Illinois |
| 23 | Geraldine Spindie | 2 | Daughter | — | Illinois |
| 24 | Patrick Mullen | 47 | Head | Police Officer | Ireland |
| 25 | Anne Mullen | 39 | Wife | — | Ireland |
| 26 | James Mullen | 16 | Son | — | Illinois |
| 27 | Mary Mullen | 14 | Daughter | — | Illinois |
| 28 | John Mullen THIS PERSON | 12 | Son | — | Illinois |
| 29 | Raymond Mullen | 9 | Son | — | Illinois |
| 30 | Eileen Mullen | 6 | Daughter | — | Illinois |
| 31 | Patricia Mullen | 3 | Daughter | — | Illinois |
| 32 | Robert A Beyer | 36 | Head | Carpenter | Illinois |
| 33 | Anna Beyer | 35 | Wife | — | Illinois |
| 34 | Wayne Beyer | 16 | Son | — | Illinois |
| 35 | Robert Beyer | 13 | Son | — | Illinois |
| 36 | George Kruse | 40 | Head | Iron Worker | Illinois |
| 37 | Agnes Kruse | 37 | Wife | — | New York |
| 38 | Anna Lundson | 73 | Head | — | Canada Eng |
| 39 | Emily Lundson | 44 | Daughter | Stenographer | N. Hampshire |
| 40 | Lee Lundson | 39 | Son | Laborer | 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)