JM
John Mckenna — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sac-County, Iowa
Our Model Tree links this John Mckenna across the 1930 and 1940 US Censuses in Sac-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1886), then head of a 7-person household.
Age 54
b. ~1886
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Sac-County, Iowa |
| Surname | McKenna |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Sac City |
| 1935 Residence (County) | Sac |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 600 |
| Highest Grade | 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Jackson Twp |
| Est. Birth Year | ~1886 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mckenna | Daughter | — | 21 | ~1919 |
| John Mckenna | Head | — | 54 | ~1886 |
| James Mckenna | Son | — | 22 | ~1918 |
| Bernard Mckenna | Son | — | 14 | ~1926 |
| Donald Mckenna | Son | — | 12 | ~1928 |
| Melvin Mckenna | Son | — | 19 | ~1921 |
| Alma Mckenna | Spouse | — | 53 | ~1887 |
Census Appearances
1930
Sac, Iowa
Head, age 43
Sac, Iowa · implied b. ~1887 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McKenna |
| Given Name | John F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 27 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Canada-French |
| Occupation | Farmer |
| Industry | Farm Operator |
| Class of Worker | E |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Sac-County, Iowa
Head, age 54
Sac-County, Iowa · implied b. ~1886 — 7 household members
| Surname | McKenna |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Sac City |
| 1935 Residence (County) | Sac |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 600 |
| Highest Grade | 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 Mckenna across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mckenna
Head · 1940 · age 54 · b. ~1886 · 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 — Sac-County, Iowa
Open full size
1940 US Federal Census — Sac-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01201-00669)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John F. Mckenna THIS PERSON | 54 | Head | Farmer | Iowa |
| 2 | Alma J. Mckenna | 53 | Wife | Housewife | Iowa |
| 3 | James A. Mckenna | 22 | Son | — | Iowa |
| 4 | Margaret A. Mckenna | 21 | Daughter | — | Iowa |
| 5 | Melvin J. Mckenna | 19 | Son | — | Iowa |
| 6 | Bernard M. Mckenna | 14 | Son | — | Iowa |
| 7 | Donald J. Mckenna | 12 | Son | — | Iowa |
| 8 | John H. Sampers | 34 | Head | Farm Hand | Iowa |
| 9 | Lucille Sampers | 25 | Wife | Housewife | Iowa |
| 10 | Janet C. Sampers | 1 | Daughter | — | Iowa |
| 11 | Kenneth J. Domino | 31 | Head | Farmer | Iowa |
| 12 | Helen S. Domino | 30 | Wife | Housewife | Iowa |
| 13 | Adair S. Domino | 10 | Daughter | — | Iowa |
| 14 | Burdette Domino | 8 | Son | — | Iowa |
| 15 | Larry G. Domino | 1 | Son | — | Iowa |
| 16 | Peter A. Hoffman | 42 | Head | Farmer | Iowa |
| 17 | Helen Hoffman | 34 | Wife | Housewife | Iowa |
| 18 | Gerald F. Hoffman | 10 | Son | — | Iowa |
| 19 | Mary Jane Hoffman | 7 | Daughter | — | Iowa |
| 20 | Paul P. Hoffman | 2 | Son | — | Iowa |
| 21 | John E. Mcdonald | 60 | Head | Farmer | Illinois |
| 22 | Iola G. Mcdonald | 62 | Wife | Housewife | Illinois |
| 23 | Fred Hecht | 46 | Hired Hand | Farm Hand | Iowa |
| 24 | Frank Mcbee | 37 | Head | Farm Hand | Missouri |
| 25 | Viola C. Mcbee | 34 | Wife | Housewife | Iowa |
| 26 | Ramona M. Mcbee | 10 | Daughter | — | Iowa |
| 27 | Loretta C. Mcbee | 8 | Daughter | — | Iowa |
| 28 | Delores J. Mcbee | 6 | Daughter | — | Iowa |
| 29 | Roland D. Mcbee | 2 | Son | — | Iowa |
| 30 | H. Wanatta | 0 | Daughter | — | Iowa |
| 31 | R. Conquergood | 47 | Head | Farmer | Iowa |
| 32 | La Vere Conquergood | 46 | Wife | Housewife | Iowa |
| 33 | Hallett G. Conquergood | 17 | Son | — | Canada |
| 34 | Crawley C. Conquergood | 15 | Son | — | Idaho |
| 35 | Glenn S. Conquergood | 13 | Son | — | Idaho |
| 36 | Chester W. Davis | 32 | Head | Farmer | Iowa |
| 37 | Florance S. Davis | 30 | Wife | Housewife | Iowa |
| 38 | Mary Ann Davis | 8 | Daughter | — | Iowa |
| 39 | Donald D. Davis | 5 | Son | — | Iowa |
| 40 | Mahlon C. Henrich | 35 | Head | — | 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)