TC
Thomas Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mercer-County, Pennsylvania
Our Model Tree links this Thomas Campbell across the 1920, 1930 and 1940 US Censuses in Mercer-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Elnora & Elverta — first a son (b.~1914), then head of a 5-person household.
Age 26
b. ~1914
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, Pennsylvania |
| Surname | Campbell |
| Given Name | Thomas R. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Findley T |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Occupation | clerk |
| Industry | retail grocery |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 612 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Clerk |
| Township / Ward | Findley T |
| Est. Birth Year | ~1914 |
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 |
|---|---|---|---|---|
| Mary Campbell | Daughter | — | 20 | ~1920 |
| Milo Campbell | Head | — | 59 | ~1881 |
| Thomas Campbell | Son | — | 26 | ~1914 |
| George Campbell | Son | — | 29 | ~1911 |
| Elverta Campbell | Spouse | — | 60 | ~1880 |
Census Appearances
1920
Mercer, Pennsylvania
Son, age 6
Mercer, Pennsylvania · implied b. ~1914 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Thomas R |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Mercer, Pennsylvania
Son, age 17
Mercer, Pennsylvania · implied b. ~1913 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Mercer-County, Pennsylvania
Son, age 26
Mercer-County, Pennsylvania · implied b. ~1914 — 5 household members
| Surname | Campbell |
| Given Name | Thomas R. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Findley T |
| 1935 Residence (County) | Mercer |
| Occupation | clerk |
| Industry | retail grocery |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 612 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Campbell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Elnora Campbell (~0.92 confidence) and mother Elverta Campbell (~0.92 confidence) and mother Cluerta Campbell (~0.92 confidence) and father Milo Campbell (~0.92 confidence) and father Willie Campbell (~0.92 confidence) and father Milo Campbell (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Elnora Campbell
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Elverta Campbell
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Cluerta Campbell
b. ~1881
Source mother
● Household
· direct · ~0.92
Father
Milo Campbell
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Willie Campbell
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Milo Campbell
b. ~1882
Source father
● Household
· direct · ~0.92
This person
Anchor record
Thomas Campbell
Son · 1940 · age 26 · b. ~1914 · Pennsylvania
★ You are viewing this record
Sibling
Mary Campbell
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Campbell
Sibling · 1940 · age 29
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 — Mercer-County, Pennsylvania
Open full size
1940 US Federal Census — Mercer-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03570-00532)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Martha Crowther | 26 | daughter | Teacher | Pennsylvania |
| 2 | Howard F. Taylor | 51 | head | Proprietor | Pennsylvania |
| 3 | Esther M. Taylor | 44 | wife | — | Pennsylvania |
| 4 | John E. Taylor | 23 | son | Mechanic | Pennsylvania |
| 5 | L. Marie Taylor | 20 | daughter | Clerk | Pennsylvania |
| 6 | Imogene Taylor | 14 | daughter | — | Pennsylvania |
| 7 | Thelma Taylor | 9 | daughter | — | Pennsylvania |
| 8 | John P. Rowe | 77 | father-in-law | — | England |
| 9 | Arthur S. Martwick | 31 | head | Spot Welder | Pennsylvania |
| 10 | Hazel C. Martwick | 26 | wife | — | Pennsylvania |
| 11 | Donald J. Martwick | 5 | son | — | Pennsylvania |
| 12 | Marie G. Martwick | 55 | mother | — | England |
| 13 | Milo R. Campbell | 59 | head | Farmer | Pennsylvania |
| 14 | Elverta J. Campbell | 60 | wife | Paper Hanger | Pennsylvania |
| 15 | George L. Campbell | 29 | son | Teacher | Pennsylvania |
| 16 | Thomas R. Campbell THIS PERSON | 26 | son | Clerk | Pennsylvania |
| 17 | Mary M. Campbell | 20 | daughter | Clerk | Pennsylvania |
| 18 | Justina Papp | 60 | head | — | Hungary |
| 19 | Joseph Raczonyi | 71 | brother | Farm Laborer | Hungary |
| 20 | John Krofcheck | 51 | head | Miner | Czechoslovakia |
| 21 | Marie Krofcheck | 46 | wife | — | Czechoslovakia |
| 22 | L. Sofia Krofcheck | 25 | daughter | Servant | Pennsylvania |
| 23 | Frank J. Krofcheck | 23 | son | Miner | Pennsylvania |
| 24 | John Krofcheck | 21 | son | Farm Laborer | Pennsylvania |
| 25 | John J. Schiester | 47 | head | Mine Foreman | Pennsylvania |
| 26 | Elizabeth M. Schiester | 34 | wife | — | Pennsylvania |
| 27 | John R. Schiester | 17 | son | Farm Laborer | Pennsylvania |
| 28 | Marjorie R. Schiester | 14 | daughter | — | Pennsylvania |
| 29 | Helen V. Schiester | 14 | daughter | — | Pennsylvania |
| 30 | George L. Schiester | 13 | son | — | Pennsylvania |
| 31 | Buddy L. Covert | 59 | head | Farmer | Pennsylvania |
| 32 | Ella B. Covert | 52 | wife | — | Pennsylvania |
| 33 | Buddy L. Covert | 7 | son | — | Pennsylvania |
| 34 | Joseph Zimmerman | 62 | head | Farmer | Pennsylvania |
| 35 | Archibald H. Millard | 37 | head | Mechanic | Pennsylvania |
| 36 | Agnes M. Millard | 36 | wife | — | Pennsylvania |
| 37 | Glenn B. Millard | 14 | son | — | Pennsylvania |
| 38 | John D. Millard | 11 | son | — | Pennsylvania |
| 39 | Nancy A. Millard | 7 | daughter | — | Pennsylvania |
| 40 | Theresa Schiester | 78 | mother-in-law | — | Austria |
Pedigree Summary
Thomas + 2 siblings
Gen 1 · 6 parents
~0.92
Max depth 4 (1900–1950 window)
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)