JM
John Madden — 1940 US Census Record
Model Tree available1940 United States Federal Census · Denver-County, Colorado
Our Model Tree links this John Madden across the 1920, 1930 and 1940 US Censuses in Denver-County, Colorado (XGBoost, ~Confirmed), with identified parents Eugene & Annie — first a son (b.~1903), then head of a 3-person household.
Age 37
b. ~1903
Male
Son
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Denver-County, Colorado |
| Surname | Madden |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Denver City & County |
| 1935 Residence (County) | Denver |
| Additional Details | |
| Occupation | Salesman |
| Industry | Insurance Co |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 804 |
| Highest Grade | C 5 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Salesman |
| Township / Ward | Denver City County |
| Est. Birth Year | ~1903 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Eugene Madden | Head | — | 78 | ~1862 |
| John Madden | Son | — | 37 | ~1903 |
| Annie Madden | Spouse | — | 68 | ~1872 |
Census Appearances
1920
Denver, Colorado
Son, age 17
Denver, Colorado · implied b. ~1903 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Madden |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Denver, Colorado
Son, age 27
Denver, Colorado · implied b. ~1903 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Madden |
| Given Name | John O |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | supervisor |
| Industry | department store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Denver-County, Colorado
Son, age 37
Denver-County, Colorado · implied b. ~1903 — 3 household members
| Surname | Madden |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Denver City & County |
| 1935 Residence (County) | Denver |
| Occupation | Salesman |
| Industry | Insurance Co |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 804 |
| Highest Grade | C 5 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 Madden across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Eugene Madden (~0.92 confidence) and mother Annie Madden (~0.92 confidence) and mother Julia Madden (~0.92 confidence) and mother Ina Madden (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Eugene Madden
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Annie Madden
b. ~1872
Source mother
● Household
· direct · ~0.92
Mother
Julia Madden
b. ~1874
Source mother
● Household
· direct · ~0.92
Mother
Ina Madden
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Madden
Son · 1940 · age 37 · b. ~1903 · Colorado
★ 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 — Denver-County, Colorado
Open full size
1940 US Federal Census — Denver-County, Colorado
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00485-00485)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Eugene Madden | 78 | Head | Owner Pool Hall | Illinois |
| 42 | Annie Madden | 68 | Wife | — | Illinois |
| 43 | John J. Madden THIS PERSON | 37 | Son | Salesman | Colorado |
| 44 | Lillian E. Young | 46 | Head | — | Colorado |
| 45 | George E. Young | 76 | Lodger | Painter | Illinois |
| 46 | John Dunn | 50 | Lodger | Truck Driver | Massachusetts |
| 47 | Lina Harvey | 58 | Head | — | Pennsylvania |
| 48 | William J. Harvey | 15 | Son | — | Colorado |
| 49 | Mary S. Rundle | 65 | Sister | — | Ohio |
| 50 | Leo B. Mijares | 52 | Head | Machinist | Mexico |
| 51 | Catalina Mijares | 41 | Wife | — | Mexico |
| 52 | Leo B. Mijares | 26 | Son | Truck Driver | Mexico |
| 53 | Esther Mijares | 20 | Daughter | — | New Mexico |
| 54 | Angel Mijares | 12 | Son | — | Texas |
| 55 | Pete A. Duran | 28 | Head | Bus Boy | New Mexico |
| 56 | Lucy Duran | 28 | Wife | — | New Mexico |
| 57 | Margaret Mcmanus | 73 | Head | — | Virginia |
| 58 | James Mcmanus | 40 | Son | Truck Driver | Missouri |
| 59 | Henry E. Fligh | 67 | Head | Carpenter | Pennsylvania |
| 60 | Sophie Fligh | 75 | Sister | — | Pennsylvania |
| 61 | Francis Lopez | 39 | Head | Clerk And Owner | Colorado |
| 62 | Manuel Lopez | 20 | Son | — | Colorado |
| 63 | Ernest Lopez | 18 | Son | — | Colorado |
| 64 | Charles R. Cook | 72 | Lodger | Inspector | Colorado |
| 65 | Milton H. Carmack | 57 | Head | Switchman | Maryland |
| 66 | Helen S. Carmack | 45 | Wife | — | Illinois |
| 67 | Milton H. Carmack | 21 | Son | Clerk - Trust Dept | Colorado |
| 68 | Mary C. Carmack | 14 | Daughter | — | Colorado |
| 69 | Richard Cordes | 82 | Father-in-law | — | Germany |
| 70 | Henry Cordes | 55 | Head | Painter | Colorado |
| 71 | Margaret G. Cordes | 54 | Wife | Pharmacist | Kansas |
| 72 | Margaret Johns | 72 | Lodger | — | Germany |
| 73 | Andrew Schidtmatt | 66 | Head | Carpenter | Pennsylvania |
| 74 | Walter M. Flint | 65 | Head | Engineer | Missouri |
| 75 | Ester L. Flint | 59 | Wife | — | Kansas |
| 76 | Anna Lundgren | 50 | Sister-in-law | Clerk | Kansas |
| 77 | Christina Filia | 68 | Head | — | Austria-Tyrol |
| 78 | Catherine Carrol | 83 | Head | — | Eire |
| 79 | Eugenia Griebling | 70 | Head | — | France |
Pedigree Summary
John
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)