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John Mccann — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Union-County, Iowa
Our Model Tree links this John Mccann across the 1930 and 1940 US Censuses in Union-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1917), then head of a 10-person household.
Age 23
b. ~1917
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, Iowa |
| Surname | McCann |
| Given Name | John E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Union |
| Additional Details | |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 75 |
| Highest Grade | H 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Laborer |
| Township / Ward | Dodge Township |
| Est. Birth Year | ~1917 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Sylvester Mccann | Son | — | 16 | ~1924 |
| John Mccann | Son | — | 23 | ~1917 |
| Doris Mccann | Daughter | — | 20 | ~1920 |
| Earl Mccann | Son | — | 13 | ~1927 |
| Helen Mccann | Daughter | — | 11 | ~1929 |
| Opal Mccann | Spouse | — | 46 | ~1894 |
| Ruth Mccann | Daughter | — | 8 | ~1932 |
| Shirley Mccann | Daughter | — | 10 | ~1930 |
| Richard Mccann | Head | — | 52 | ~1888 |
| Beverly Mccann | Daughter | — | ~1940 |
Census Appearances
1930
Union, Iowa
Son, age 13
Union, Iowa · implied b. ~1917 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCann |
| Given Name | John E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Union-County, Iowa
Son, age 23
Union-County, Iowa · implied b. ~1917 — 10 household members
| Surname | McCann |
| Given Name | John E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Union |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 75 |
| Highest Grade | H 8 |
| 1935 Residence | Iowa |
| 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 Mccann across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mccann
Son · 1940 · age 23 · b. ~1917 · Iowa
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Sibling
Sylvester Mccann
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Mccann
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Mccann
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Mccann
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Beverly Mccann
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Earl Mccann
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Shirley Mccann
Sibling · 1940 · age 10
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 — Union-County, Iowa
Open full size
1940 US Federal Census — Union-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01208-00242)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Naomi M Paulus | 66 | Wife | — | Iowa |
| 42 | George W White | 65 | Head | Farming | Kentucky |
| 43 | Susie E White | 58 | Wife | — | Kentucky |
| 44 | Harold A James | 26 | Hired man | Farming | Iowa |
| 45 | George Mccann | 57 | Head | Farming | Iowa |
| 46 | James O Adamson | 57 | Head | Farming | Iowa |
| 47 | Jennie Adamson | 42 | Wife | — | Iowa |
| 48 | Dorrain Adamson | 28 | Daughter | — | Iowa |
| 49 | Bernice X Adamson | 15 | Daughter | — | Iowa |
| 50 | Leonard W Paulus | 36 | Head | Farming | Iowa |
| 51 | Gladys M Paulus | 30 | Wife | — | Missouri |
| 52 | Eugene L Paulus | 11 | Son | — | Iowa |
| 53 | Paula Paulus | 10 | Daughter | — | Iowa |
| 54 | Billie D Paulus | 1 | Son | — | Iowa |
| 55 | Glen C Paulus | 39 | Head | Farming | Iowa |
| 56 | Stella F Paulus | 31 | Wife | — | Iowa |
| 57 | Gordon G Paulus | 8 | Son | — | Iowa |
| 58 | Shirley J Paulus | 3 | Daughter | — | Iowa |
| 59 | Morris J Lahn | 70 | Head | Farming | Iowa |
| 60 | Myron Hainline | 47 | Head | Farming | Iowa |
| 61 | Myrtle Hainline | 48 | Wife | — | Iowa |
| 62 | Gary Hainline | 10 | Son | — | Iowa |
| 63 | Richard Mccann | 52 | Head | Farming | Iowa |
| 64 | Opal L Mccann | 46 | Wife | — | Iowa |
| 65 | John E Mccann THIS PERSON | 23 | Son | Laborer | Iowa |
| 66 | Doris E Mccann | 20 | Daughter | — | Iowa |
| 67 | Sylvester H Mccann | 16 | Son | — | Iowa |
| 68 | Earl R Mccann | 13 | Son | — | Iowa |
| 69 | Helen J Mccann | 11 | Daughter | — | Iowa |
| 70 | Shirley J Mccann | 10 | Daughter | — | Iowa |
| 71 | Ruth I Mccann | 8 | Daughter | — | Iowa |
| 72 | Beverly J Mccann | 0 | Daughter | — | Iowa |
| 73 | Edward Metzger | 42 | Head | Boilermaker | Iowa |
| 74 | Emma F Metzger | 42 | Wife | — | Nebraska |
| 75 | Martin L Metzger | 9 | Son | — | Dakota |
| 76 | Margaret M Metzger | 4 | Daughter | — | Iowa |
| 77 | Roger H Harris | 33 | Head | Farming | Oklahoma |
| 78 | Willie C Petznick | 59 | Head | Farming | Iowa |
| 79 | Susie Petznick | 60 | Wife | — | Iowa |
| 80 | Edson F Roberts | 77 | Head | Farming | Ohio |
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)