JH
John Harrington — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Silver-Bow-County, Montana
Our Model Tree links this John Harrington across the 1930 and 1940 US Censuses in Silver-Bow-County, Montana (XGBoost, ~Confirmed) — first a son (b.~1909), then head of a 9-person household.
Age 31
b. ~1909
Male
Son
Born: Montana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Silver-Bow-County, Montana |
| Surname | Harrington |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Butte City |
| 1935 Residence (County) | Silver Bow |
| Additional Details | |
| Highest Grade | C 2 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Township / Ward | Butte City |
| Est. Birth Year | ~1909 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mary Smyers | Daughter | — | 9 | ~1931 |
| Kathryn Harrington | Daughter | — | 33 | ~1907 |
| Margaret Harrington | Daughter | — | 41 | ~1899 |
| Mary Smyers | Daughter | — | 43 | ~1897 |
| Louise Smyers | Daughter | — | 11 | ~1929 |
| Mary Harrington | Head | — | 61 | ~1879 |
| James Smyers | Son | — | 13 | ~1927 |
| John Harrington | Son | — | 31 | ~1909 |
| Gene Smyers | Son | — | 15 | ~1925 |
Census Appearances
1930
Silver Bow, …
Other, age 20
Silver Bow, Montana · implied b. ~1910 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harrington |
| Given Name | Joan |
| Relationship to Head | Lodger |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Miner |
| Industry | Copper mine |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Silver-Bow-County, Montana
Son, age 31
Silver-Bow-County, Montana · implied b. ~1909 — 9 household members
| Surname | Harrington |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Butte City |
| 1935 Residence (County) | Silver Bow |
| Highest Grade | C 2 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
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 Harrington across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Harrington
Son · 1940 · age 31 · b. ~1909 · Montana
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Sibling
Mary Smyers
Sibling · 1940 · age 43
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Smyers
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathryn Harrington
Sibling · 1940 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Smyers
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gene Smyers
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Harrington
Sibling · 1940 · age 41
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louise Smyers
Sibling · 1940 · age 11
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 — Silver-Bow-County, Montana
Open full size
1940 US Federal Census — Silver-Bow-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02230-00852)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edward Peterson | 80 | Head | Railroad Man | Sweden |
| 42 | Hilda Peterson | 72 | Wife | — | Sweden |
| 43 | John Cargill | 36 | Head | Asst Administrator | Montana |
| 44 | Florence Cargill | 33 | Wife | — | Montana |
| 45 | Florence Rae Cargill | 2 | Daughter | — | Montana |
| 46 | Margaret Lucey | 49 | Head | Book Binding | Ireland |
| 47 | Sheila Lucey | 19 | Daughter | — | Montana |
| 48 | Thomas Fowler | 60 | Head | Fireman | England |
| 49 | Martha Fowler | 61 | Wife | — | England |
| 50 | William Fowler | 25 | Son | Teacher | England |
| 51 | Dale Auleau | Aulean | 33 | Head | Miner | Montana |
| 52 | Catherine Auleau | Aulean | 33 | Wife | — | Montana |
| 53 | Dwyer Auleau | Aulean | 7 | Daughter | — | Montana |
| 54 | Mary A. Harrington | 61 | Head | — | Michigan |
| 55 | Margaret Harrington | 41 | Daughter | Teacher | Montana |
| 56 | Kathryn Harrington | 33 | Daughter | Teacher | Montana |
| 57 | John Harrington THIS PERSON | 31 | Son | — | Montana |
| 58 | Mary A. Smyers | 43 | Daughter | — | Montana |
| 59 | Gene Smyers | 15 | Son | — | Utah |
| 60 | James Smyers | 13 | Son | — | Montana |
| 61 | Louise Smyers | 11 | Daughter | — | Montana |
| 62 | Mary Ann Smyers | 9 | Daughter | — | Montana |
| 63 | Theo Elmer | 37 | Head | Clerk | Montana |
| 64 | Catherine Elmer | 31 | Wife | — | Montana |
| 65 | Mary Jean Elmer | 2 | Daughter | — | Montana |
| 66 | John Michael Elmer | 0 | Son | — | Montana |
| 67 | Rudolph Gasking | 70 | Boarder | — | Ireland |
| 68 | John Mclaughry | 40 | Head | Truck Driver | Colorado |
| 69 | Virginia Mclaughry | 38 | Wife | — | Montana |
| 70 | James Mclaughry | 10 | Son | — | Montana |
| 71 | Badee Cheany | 59 | Mother | Office Clerk | Montana |
| 72 | John Sheehy | 76 | Head | — | New York |
| 73 | Elizabeth Sheehy | 75 | Wife | — | New York |
| 74 | Joseph Dvorak | 45 | Boarder | Salesman | Montana |
| 75 | H. H. Mason | 43 | Head | Salesman | Montana |
| 76 | Martha Mason | 43 | Wife | — | Montana |
| 77 | Karen Ann Mason | 4 | Daughter | — | Montana |
| 78 | John J. Mullan | 39 | Head | R.R. Manager | Montana |
| 79 | Ann Mullan | 34 | Wife | — | Montana |
| 80 | Barbara Mullan | 13 | Daughter | — | Montana |
Related Census Records
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)