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Lydia Smith — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Montgomery-County, Pennsylvania

Our Model Tree links this Lydia Smith across the 1930 and 1940 US Censuses in Montgomery-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 9-person household.

Age 18 b. ~1922 Female Daughter Born: Penna Single

1940 Census Record Details

Census Year1940
LocationMontgomery-County, Pennsylvania
SurnameSmith
Given NameLydia
Relationship to HeadDaughter
SexF
Color / RaceWhite
Age18
Marital StatusSingle
BirthplacePenna
1935 Residence (City)Plymouth Township
1935 Residence (County)Montg.
Additional Details
OccupationNew Worker
Highest GradeHs 4
1935 ResidencePenna
Birth StatePennsylvania
Birth CountryUnited States
Birthplace (normalized)penna
OccupationNew Worker
Township / WardWest Conshohocken Borough
Est. Birth Year~1922

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 Lydia Age Birth yr
Alberta Smith Daughter — 4 ~1936
Janet Smith Daughter — 3 ~1937
Lydia Smith Daughter — 18 ~1922
Helen Smith Daughter — 16 ~1924
Eva Smith Daughter — 21 ~1919
John Smith Head — 49 ~1891
John Smith Other — 9 ~1931
Harold Smith Son — 21 ~1919
Ellen Smith Spouse — 47 ~1893

Census Appearances

1930
Montgomery, Pennsylvania
Daughter, age 8
Montgomery, Pennsylvania · implied b. ~1922 — 12 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Smith
Given Name Lydia A.
Relationship to Head Daughter
Sex F
Color / Race White
Age 8
Marital Status Single
Birthplace Penna.
Father's Birthplace Penna.
Mother's Birthplace Penna.
Can Read/Write Yes
Birth State Pennsylvania
Birth Country United States
Birthplace (normalized) penna
1940
Montgomery-County, Pennsylvania
Daughter, age 18
Montgomery-County, Pennsylvania · implied b. ~1922 — 9 household members
Surname Smith
Given Name Lydia
Relationship to Head Daughter
Sex F
Color / Race White
Age 18
Marital Status Single
Birthplace Penna
1935 Residence (City) Plymouth Township
1935 Residence (County) Montg.
Occupation New Worker
Highest Grade Hs 4
1935 Residence Penna
Birth State Pennsylvania
Birth Country United States
Birthplace (normalized) penna

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.
Linked across censuses
Our Model Tree links Lydia Smith across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Lydia Smith
Daughter · 1940 · age 18 · b. ~1922 · Pennsylvania
★ You are viewing this record
Sibling
Harold Smith
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alberta Smith
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Janet Smith
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eva Smith
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Smith
Sibling · 1940 · age 16
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 — Montgomery-County, Pennsylvania Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-03586-00088)

Line Name Age Relation Occupation Birthplace
1 John Smith 49 Head Laborer Penna
2 Ellen Smith 47 Wife — Penna
3 Harold Smith 21 Son Laborer Penna
4 Eva Smith 21 Daughter New Worker Penna
5 Lydia Smith THIS PERSON 18 Daughter New Worker Penna
6 Helen Smith 16 Daughter — Penna
7 John Jr. Smith 9 Grandson — Penna
8 Alberta Smith 4 Daughter — Penna
9 Janet Smith 3 Daughter — Penna
10 Edward Brown 60 Head Cutter Penna
11 Annie Brown 52 Wife — Penna
12 George Morrow 29 Head Upholsterer Eire
13 Margaret Morrow 33 Partner — Penna
14 James Morrow 10 Partner's son — Penna
15 Mary Mccabe 43 Head — Penna
16 Katherine Kavanaugh 78 Aunt — Penna
17 Edgar Bookert 72 Head Laborer Penna
18 Ida J. Talley 50 Housekeeper Housekeeper New Jersey
19 Edward Daily 24 Head Partner Penna
20 Irene Daily 22 Wife — Penna
21 Irene Daily 0 Daughter — Penna
22 Edward Hoffman 60 Father in law — Germany
23 Ernest Jr. Simmons 28 Head Butcher Penna
24 Helen Simmons 29 Wife — Penna
25 Ernest Jr. Simmons 2 Son — Penna
26 John Clementino 51 Head Helper Penna
27 Laura Clementino 50 Wife — Penna
28 Roy Clementino 24 Son — Penna
29 Charles Mcshane 38 Head Laborer Penna
30 Stephen Mcshane 36 Brother Laborer Penna
31 Elizabeth Mcshane 34 Sister — Penna
32 Thomas Kelly 33 Brother in law Helper Penna
33 Mary Kelly 32 Sister — Penna
34 Constance Kelly 11 Neice — Penna
35 Patricia Kelly 9 Neice — Penna
36 Mary Gertrude Kelly 3 Neice — Penna
37 Mary Mcshane 65 Mother — England
38 Philip O'Brien 66 Head Proprietor Penna
39 Elizabeth O'Brien 66 Wife — Penna
40 Mary A. Rooney 72 Head — Penna

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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)

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