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Thomas Armstrong — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Montgomery-County, Pennsylvania
Our Model Tree links this Thomas Armstrong across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1884), then head of a 5-person household.
Age 56
b. ~1884
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Pennsylvania |
| Surname | Armstrong |
| Given Name | Thomas S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Lower Merion |
| 1935 Residence (County) | Montgomery |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Gardener |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 704 |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Gardener |
| Township / Ward | Lower Merion |
| Est. Birth Year | ~1884 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Thomas Armstrong | Head | — | 56 | ~1884 |
| Alice Armstrong | Daughter | — | 24 | ~1916 |
| Alice Armstrong | Spouse | — | 56 | ~1884 |
| Sally Armstrong | Daughter | — | 18 | ~1922 |
| Ileen Armstrong | Daughter | — | 21 | ~1919 |
Census Appearances
1920
Philadelphia, Pennsylvania
Head, age 37
Philadelphia, Pennsylvania · implied b. ~1883 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Thomas M. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1907 |
| Naturalization Status | Alien |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | boilermaker |
| Industry | locomotive works |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
Philadelphia, Pennsylvania
Head, age 45
Philadelphia, Pennsylvania · implied b. ~1885 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1907 |
| Age at First Marriage | 22 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Gardener |
| Industry | Private House |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 50.00 |
| Radio Set | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Montgomery-County, Pennsylvania
Head, age 56
Montgomery-County, Pennsylvania · implied b. ~1884 — 5 household members
| Surname | Armstrong |
| Given Name | Thomas S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Lower Merion |
| 1935 Residence (County) | Montgomery |
| Naturalization Status | Naturalized |
| Occupation | Gardener |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 704 |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 Thomas Armstrong across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Thomas Armstrong
Head · 1940 · age 56 · b. ~1884 · Pennsylvania
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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 — Montgomery-County, Pennsylvania
Open full size
1940 US Federal Census — Montgomery-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03580-00167)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Joseph Crowley | 17 | Son | — | Pennsylvania |
| 42 | Marion Crowley | 11 | Daughter | — | Pennsylvania |
| 43 | William G. Pierce | 33 | Head | Insurance Agent | Pennsylvania |
| 44 | Margaret S. Pierce | 27 | Wife | — | Pennsylvania |
| 45 | Henry H. Perry | 44 | Head | Physician | N. Carolina |
| 46 | Edith Perry | 45 | Wife | — | Pennsylvania |
| 47 | David Perry | 14 | Son | — | Pennsylvania |
| 48 | Barbara Perry | 13 | Daughter | — | Pennsylvania |
| 49 | Mae S. Reardon | 42 | Servant | Domestic Maid | Pennsylvania |
| 50 | Clara D. Conway | 36 | Servant | House Maid | New Jersey |
| 51 | Agnes Conway | 36 | Servant | Cook | Virginia |
| 52 | Sydney R. Cuff | 73 | Head | Gardener | England |
| 53 | Elizabeth Cuff | 73 | Wife | — | England |
| 54 | Phyllis Annie Cuff | 42 | Daughter | Domestic Maid | England |
| 55 | Arthur L. Coxe | 31 | Head | Physician | Indiana |
| 56 | Bernice Coxe | 31 | Wife | — | Indiana |
| 57 | Mary J. Ball | 25 | Head | Secretary | Pennsylvania |
| 58 | Louise Claire Vail | 31 | Head | History Teacher | Pennsylvania |
| 59 | Martha Cox | 31 | Partner | English Teacher | New York |
| 60 | Kathy S. Miller | 46 | Head | — | Pennsylvania |
| 61 | Mary A. Miller | 80 | Mother | — | Rhode Island |
| 62 | Marion Strong | 20 | Daughter | — | Wash. D.C. |
| 63 | William W. Strong | 18 | Son | — | California |
| 64 | Edith J. Strong | 16 | Daughter | — | Wash. D.C. |
| 65 | Elizabeth S. Strong | 14 | Daughter | — | Wash. D.C. |
| 66 | James Lomax | 35 | Servant | House Man | Virginia |
| 67 | Eva Lomax | 32 | Servant | Cook | Virginia |
| 68 | John H. Clark | 65 | Head | — | Pennsylvania |
| 69 | Marion L. Clark | 56 | Wife | — | Maine |
| 70 | Thomas S. Armstrong THIS PERSON | 56 | Head | Gardener | Ireland |
| 71 | Alice Armstrong | 56 | Wife | — | Ireland |
| 72 | Alice Armstrong | 24 | Daughter | Clerk | Pennsylvania |
| 73 | Ileen Armstrong | 21 | Daughter | Secretary | Pennsylvania |
| 74 | Sally Armstrong | 18 | Daughter | — | Pennsylvania |
| 75 | William S. Scullly | 75 | Head | Inspector | New Jersey |
| 76 | Katherine Scullly | 57 | Wife | — | Pennsylvania |
| 77 | Mary Mcguire | 29 | Servant | Domestic Maid | Pennsylvania |
| 78 | Isabel Lewis | 64 | Servant | Domestic Maid | Scotland |
| 79 | Maxwell S. Speig | 42 | Head | German Teacher | Germany |
| 80 | Martha M. Speig | 43 | Wife | Music Teacher | Missouri |
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)