JM
John Madden — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Johnson-County, Iowa
Our Model Tree links this John Madden across the 1930 and 1940 US Censuses in Johnson-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1892), then head of a 12-person household.
Age 48
b. ~1892
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Johnson-County, Iowa |
| Surname | Madden |
| Given Name | John R |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Madison Township |
| 1935 Residence (County) | Johnson |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Madison Township |
| Est. Birth Year | ~1892 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Virginia Madden | Daughter | — | 5 | ~1935 |
| George Madden | Son | — | 22 | ~1918 |
| Joan Madden | Daughter | — | 9 | ~1931 |
| Dorothy Madden | Daughter | — | 8 | ~1932 |
| Margaret Madden | Daughter | — | 1 | ~1939 |
| Lyle Madden | Son | — | 17 | ~1923 |
| Wilbur Madden | Son | — | 19 | ~1921 |
| Marlene Madden | Daughter | — | 3 | ~1937 |
| Ruth Madden | Daughter | — | 12 | ~1928 |
| Lillie Madden | Spouse | — | 42 | ~1898 |
| Maxine Madden | Daughter | — | 16 | ~1924 |
| John Madden | Head | — | 48 | ~1892 |
Census Appearances
1930
Johnson, Iowa
Head, age 38
Johnson, Iowa · implied b. ~1892 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Madden |
| Given Name | John F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 23 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 35 |
| Radio Set | R |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Johnson-County, Iowa
Head, age 48
Johnson-County, Iowa · implied b. ~1892 — 12 household members
| Surname | Madden |
| Given Name | John R |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Madison Township |
| 1935 Residence (County) | Johnson |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Madden
Head · 1940 · age 48 · b. ~1892 · Iowa
★ 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 — Johnson-County, Iowa
Open full size
1940 US Federal Census — Johnson-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01171-00740)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Paul J Swenka | 57 | Head | Farmer | Iowa |
| 42 | Mary Swenka | 52 | Wife | Housewife | Iowa |
| 43 | William Swenka | 32 | Son | Farm Hand | Iowa |
| 44 | Elsie Swenka | 18 | Daughter | — | Iowa |
| 45 | Emily Swenka | 14 | Daughter | — | Iowa |
| 46 | Leona Swenka | 13 | Daughter | — | Iowa |
| 47 | Kenneth Swenka | 10 | Son | — | Iowa |
| 48 | Charles Shriver | 48 | Head | Farmer | Iowa |
| 49 | Agnes Shriver | 46 | Wife | Housewife | Iowa |
| 50 | Sylvester Brant | 65 | Head | Farmer | Iowa |
| 51 | Catherine Brant | 58 | Wife | Housewife | Germany |
| 52 | Frank Luichy|Luicky | 76 | Head | Farmer | Iowa |
| 53 | Harriett Luichy|Luicky | 64 | Sister | House Work | Iowa |
| 54 | Raymond Brant | 47 | Head | Farmer | Iowa |
| 55 | Lily Brant | 43 | Wife | Housewife | Iowa |
| 56 | Richard Brant | 14 | Son | Farm Help | Iowa |
| 57 | Robert Brant | 12 | Son | Farm Help | Iowa |
| 58 | Herbert Brant | 10 | Son | Farm Help | Iowa |
| 59 | Catherine Brant | 6 | Daughter | — | Iowa |
| 60 | Steven Brant | 3 | Son | — | Iowa |
| 61 | John R Madden THIS PERSON | 48 | Head | Farmer | Iowa |
| 62 | Lillie Madden | 42 | Wife | Housewife | Iowa |
| 63 | George Madden | 22 | Son | Farm Help | Iowa |
| 64 | Wilbur Madden | 19 | Son | Farm Help | Iowa |
| 65 | Lyle Madden | 17 | Son | Farm Help | Iowa |
| 66 | Maxine Madden | 16 | Daughter | In School | Iowa |
| 67 | Ruth Madden | 12 | Daughter | — | Iowa |
| 68 | Joan Madden | 9 | Daughter | — | Iowa |
| 69 | Dorothy Madden | 8 | Daughter | — | Iowa |
| 70 | Virginia Madden | 5 | Daughter | — | Iowa |
| 71 | Marlene Madden | 3 | Daughter | — | Iowa |
| 72 | Margaret Madden | 1 | Daughter | — | Iowa |
| 73 | H. P. Anderson | 52 | Head | Farmer | Iowa |
| 74 | Ora Anderson | 52 | Wife | Housewife | Iowa |
| 75 | Dell Anderson | 27 | Son | Farm Labor | Wyoming |
| 76 | Bernice Anderson | 20 | Daughter | Clerk | Iowa |
| 77 | E. W. Watkinson | 48 | Head | Farmer | Iowa |
| 78 | Grace Watkinson | 38 | Wife | Housewife | Iowa |
| 79 | Edward Watkinson | 14 | Son | School | Iowa |
| 80 | Richard E Watkinson | 10 | Son | School | Iowa |
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)