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James Dugan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this James Dugan across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 7-person household.
Age 17
b. ~1923
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Dugan |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Industry | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1923 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Mary Dugan | Daughter | — | 14 | ~1926 |
| James Dugan | Son | — | 17 | ~1923 |
| Virginia Dugan | Daughter | — | 12 | ~1928 |
| Richard Dugan | Son | — | 15 | ~1925 |
| Jessie Dugan | Spouse | — | 38 | ~1902 |
| William Dugan | Son | — | 19 | ~1921 |
| William Dugan | Head | — | 42 | ~1898 |
Census Appearances
1930
Cook, Illinois
Son, age 7
Cook, Illinois · implied b. ~1923 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dugan |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 17
Cook-County, Illinois · implied b. ~1923 — 7 household members
| Surname | Dugan |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Industry | 0 |
| Highest Grade | Hs 2 |
| 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 James Dugan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Dugan
Son · 1940 · age 17 · b. ~1923 · Illinois
★ You are viewing this record
Sibling
Mary Dugan
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Dugan
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Dugan
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Dugan
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-t0627-00981-00311)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Horn | 52 | Mother-in-law | — | Pennsylvania |
| 2 | Patrick Hayes | 59 | Head | Street Car | Irish Free State |
| 3 | Joseph Mahan | 63 | Head | Laborer | Illinois |
| 4 | Bertha Mahan | 58 | Wife | — | Germany |
| 5 | Edmund Mahan | 35 | Son | Mail Carrier | Illinois |
| 6 | Eleonore Mahan | 25 | Daughter-in-law | — | Wisconsin |
| 7 | Patricia Mahan | 2 | Granddaughter | — | Illinois |
| 8 | Edward Mcgrath | 79 | Head | — | Illinois |
| 9 | Martin Cunning | 46 | Head | Stationary Engineer | Illinois |
| 10 | Gladys Cunning | 44 | Wife | Teacher | Illinois |
| 11 | Kasper Eckert | 44 | Head | — | Poland |
| 12 | Alice Eckert | 20 | Daughter | Candy Maker | Illinois |
| 13 | Mike Kovanchik | 30 | Boarder | Machinist | Pennsylvania |
| 14 | Joseph Kovanchik | 27 | Boarder | Refrigerator | Pennsylvania |
| 15 | George Boyd | 39 | Boarder | Clerk | Pennsylvania |
| 16 | Edward Mckenney | 56 | Head | Handyman | Indiana |
| 17 | George Mckenney | 33 | Son | Chef | Indiana |
| 18 | Frank Mckenney | 31 | Son | Farm Hand | Illinois |
| 19 | John Klein | 36 | Head | Draftsman | Illinois |
| 20 | Antoinette Klein | 37 | Wife | — | Czechoslovakia |
| 21 | Margaret Klein | 4 | Daughter | — | Illinois |
| 22 | John Jr. Klein | 2 | Son | — | Illinois |
| 23 | Matthew Minogue | 41 | Head | Draftsman | New York |
| 24 | Frances Minogue | 37 | Wife | — | New York |
| 25 | Rose Klein | 80 | Aunt | — | New York |
| 26 | Durand Sullivan | 58 | Head | Postal Clerk | Illinois |
| 27 | Goldie Sullivan | 53 | Wife | — | Illinois |
| 28 | Norman Sullivan | 22 | Son | Maintenance | Illinois |
| 29 | Erwin Rohr | 38 | Head | Printer | Illinois |
| 30 | Jennie Rohr | 37 | Wife | — | Pennsylvania |
| 31 | William Rohr | 16 | Son | New Worker | Illinois |
| 32 | William Dugan | 42 | Head | Police Officer | Illinois |
| 33 | Jessie Dugan | 38 | Wife | — | Illinois |
| 34 | William Jr. Dugan | 19 | Son | Auto Mechanic | Illinois |
| 35 | James Dugan THIS PERSON | 17 | Son | — | Illinois |
| 36 | Richard Dugan | 15 | Son | — | Illinois |
| 37 | Mary Dugan | 14 | Daughter | — | Illinois |
| 38 | Virginia Dugan | 12 | Daughter | — | Illinois |
| 39 | Sigwald Thompson | 49 | Head | Auto Mechanic | Norway |
| 40 | Frances Thompson | 44 | Wife | — | 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)