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John Strong — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cass-County, North Dakota
Our Model Tree links this John Strong across the 1930 and 1940 US Censuses in Cass-County, North Dakota (XGBoost, ~Confirmed) — first a head (b.~1889), then head of a 6-person household.
Age 51
b. ~1889
Male
Head
Born: Sweden
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cass-County, North Dakota |
| Surname | Strong |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Jamestown |
| 1935 Residence (County) | Stutsman |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Policeman |
| Industry | City Police |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 1572 |
| Highest Grade | No 8 |
| 1935 Residence | North Dakota |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Occupation | Policeman |
| Township / Ward | Fargo City |
| Est. Birth Year | ~1889 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Esther Strong | Spouse | — | 41 | ~1899 |
| Mildred Strong | Daughter | — | 17 | ~1923 |
| John Strong | Head | — | 51 | ~1889 |
| James Strong | Son | — | 13 | ~1927 |
| Solange Strong | Son | — | 1 | ~1939 |
| Nicolas Strong | Son | — | 11 | ~1929 |
Census Appearances
1930
Cass, North …
Head, age 41
Cass, North Dakota · implied b. ~1889 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Strong |
| Given Name | John R. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Sweden |
| Naturalization Status | Naturalized |
| Year of Immigration | 1906 |
| Age at First Marriage | 32 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Patrolman |
| Industry | Police Dept |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | O |
| Home Value / Rent | 3000 |
| Radio Set | R |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1940
Cass-County, North …
Head, age 51
Cass-County, North Dakota · implied b. ~1889 — 6 household members
| Surname | Strong |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Jamestown |
| 1935 Residence (County) | Stutsman |
| Naturalization Status | Naturalized |
| Occupation | Policeman |
| Industry | City Police |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 1572 |
| Highest Grade | No 8 |
| 1935 Residence | North Dakota |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
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 Strong across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Strong
Head · 1940 · age 51 · b. ~1889 · North Dakota
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Cass-County, North Dakota
Open full size
1940 US Federal Census — Cass-County, North Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02997-00024)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | T. O. | 39 | Head | Teacher College | Wisconsin |
| 2 | Martha S. T. O. | 35 | Wife | — | Wisconsin |
| 3 | Lester T. O. | 5 | Son | — | North Dakota |
| 4 | Betty Jane T. O. | 2 | Daughter | — | North Dakota |
| 5 | John Strong THIS PERSON | 51 | Head | Policeman | Sweden |
| 6 | Esther L. Strong | 41 | Wife | — | Minnesota |
| 7 | Mildred Strong | 17 | Daughter | — | North Dakota |
| 8 | James Strong | 13 | Son | — | North Dakota |
| 9 | Nicolas Strong | 11 | Son | — | North Dakota |
| 10 | Solange Strong | 1 | Son | — | North Dakota |
| 11 | R. Highum | 32 | Head | Sales Mgr | North Dakota |
| 12 | Alice Highum | 32 | Wife | — | North Dakota |
| 13 | Robert Highum | 3 | Son | — | Montana |
| 14 | Russell Durney | 27 | Head | Oil Attendant | Minnesota |
| 15 | Stella Durney | 27 | Wife | — | Montana |
| 16 | Joan Durney | 6 | Daughter | — | North Dakota |
| 17 | James Durney | 4 | Son | — | North Dakota |
| 18 | Mrs. Clara Beltz | 74 | Head | — | North Dakota |
| 19 | Alice Knapp | 44 | Daughter | Bookkeeper | North Dakota |
| 20 | James Knapp | 22 | Son | Salesman | North Dakota |
| 21 | John Kondaki | 40 | Lodger | Salesman | North Dakota |
| 22 | Gert Kondaki | 35 | Lodger | Housekeeper | North Dakota |
| 23 | Arthur Hild | 31 | Head | Professor | North Dakota |
| 24 | Violet Hild | 32 | Wife | — | North Dakota |
| 25 | Jeanette Hild | 4 | Daughter | — | North Dakota |
| 26 | Glenn Hild | 3 | Son | — | North Dakota |
| 27 | Robert Hild | 1 | Son | — | North Dakota |
| 28 | Morris H. Taylor | 25 | Lodger | Examiner | Utah |
| 29 | Alfred Lofgren | 55 | Head | Stock Clerk | Canada |
| 30 | Eva S. Lofgren | 51 | Wife | — | Minnesota |
| 31 | Linnie Lofgren | 26 | Son | Office Mgr | North Dakota |
| 32 | Lyman Lofgren | 23 | Son | Office | North Dakota |
| 33 | Robert Lofgren | 20 | Son | Sales Clerk | North Dakota |
| 34 | Audrey Lofgren | 17 | Daughter | — | North Dakota |
| 35 | Thomas Lofgren | 13 | Son | — | North Dakota |
| 36 | Dorothy Kruse | 33 | Head | County Nurse | New York |
| 37 | William Curran | 43 | Head | Teacher | Minnesota |
| 38 | Martha Curran | 42 | Wife | — | Minnesota |
| 39 | Thomas Curran | 11 | Son | — | North Dakota |
| 40 | James Curran | 11 | Son | — | North Dakota |
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)