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John Mcmillan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this John Mcmillan across the 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed) — first a head (b.~1902), then head of a 11-person household.
Age 38
b. ~1902
Male
Head
Born: South Carolina
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | McMillan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 38 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | Trenton City |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Occupation | Government highway work |
| Industry | GW |
| Class of Worker | 388 |
| Highest Grade | No 6 |
| 1935 Residence | 30 |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Occupation | Government Highway Work |
| Township / Ward | Trenton City |
| Est. Birth Year | ~1902 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Mcmillan | Daughter | — | 14 | ~1926 |
| Dorothy Mcmillan | Daughter | — | 8 | ~1932 |
| Bernice Mcmillan | Daughter | — | 3 | ~1937 |
| Ruth Mcmillan | Daughter | — | 16 | ~1924 |
| Gloria Mcmillan | Daughter | — | 5 | ~1935 |
| Louise Mcmillan | Daughter | — | 1 | ~1939 |
| John Mcmillan | Head | — | 38 | ~1902 |
| Edward Gorgans | Other | — | 40 | ~1900 |
| Virginia Mcmillan | Daughter | — | 10 | ~1930 |
| Katherine Mcmillan | Daughter | — | 13 | ~1927 |
| Louise Mcmillan | Spouse | — | 36 | ~1904 |
Census Appearances
1930
Mercer, New …
Head, age 31
Mercer, New Jersey · implied b. ~1899 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMullen |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 31 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Age at First Marriage | 20 |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Truck Driver |
| Industry | Brick Yard |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 10 |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Mercer-County, New …
Head, age 38
Mercer-County, New Jersey · implied b. ~1902 — 11 household members
| Surname | McMillan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 38 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | Trenton City |
| 1935 Residence (County) | Mercer |
| Occupation | Government highway work |
| Industry | GW |
| Class of Worker | 388 |
| Highest Grade | No 6 |
| 1935 Residence | 30 |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
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 Mcmillan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Mcmillan
Head · 1940 · age 38 · b. ~1902 · New Jersey
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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 — Mercer-County, New Jersey
Open full size
1940 US Federal Census — Mercer-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02434-00578)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Farners|Tarners King | None | Kingshel | — | C 2 |
| 42 | Farners|Tarners King | None | Gaelene | — | No 4 |
| 43 | James Billington | 42 | Head | Government Highway Work | North Carolina |
| 44 | Priscilla Billington | 41 | Wife | — | North Carolina |
| 45 | Mettie Billington | 22 | Daughter | Private Home | North Carolina |
| 46 | William Billington | 20 | Son | Private Builder | South Carolina |
| 47 | Mary Billington | 19 | Daughter | — | South Carolina |
| 48 | Ruth Billington | 18 | Son | — | South Carolina |
| 49 | Harry Billington | 16 | Son | — | New Jersey |
| 50 | Marion Billington | 13 | Daughter | — | New Jersey |
| 51 | Faith Billington | 11 | Daughter | — | New Jersey |
| 52 | Oratick Billington | 7 | Daughter | — | New Jersey |
| 53 | Nadine Billington | 4 | Daughter | — | New Jersey |
| 54 | John Billington | 1 | Son | — | New Jersey |
| 55 | M. Johnnie Jackson | 40 | Head | Bag Factory | Georgia |
| 56 | Joe Grant | 46 | Lodger | — | Georgia |
| 57 | John Mcmillan THIS PERSON | 38 | Head | Government Highway Work | South Carolina |
| 58 | Louise Mcmillan | 36 | Wife | — | South Carolina |
| 59 | Ruth Mcmillan | 16 | Daughter | — | New Jersey |
| 60 | Elizabeth Mcmillan | 14 | Daughter | — | New Jersey |
| 61 | Katherine Mcmillan | 13 | Daughter | — | New Jersey |
| 62 | Virginia Mcmillan | 10 | Daughter | — | New Jersey |
| 63 | Dorothy Mcmillan | 8 | Daughter | — | New Jersey |
| 64 | Gloria Mcmillan | 5 | Daughter | — | New Jersey |
| 65 | Bernice Mcmillan | 3 | Daughter | — | New Jersey |
| 66 | Louise Mcmillan | 1 | Daughter | — | New Jersey |
| 67 | Edward Gorgans | 40 | Lodger | Private Contractor | Alabama |
| 68 | Rose Davis | 60 | Head | Hospital | Virginia |
| 69 | James Davis | 23 | Son | Hotel | New Jersey |
| 70 | Paul Davis | 20 | Son | Private Contractor | New Jersey |
| 71 | Geraldine Davis | 16 | Daughter | — | New Jersey |
| 72 | Paula Davis | 13 | Daughter | — | New Jersey |
| 73 | Howard Lovett | 29 | Head | Farm | Georgia |
| 74 | Beauty Lovett | 23 | Wife | — | Georgia |
| 75 | Jr. Howard Lovett | 6 | Son | — | New Jersey |
| 76 | Katherine Lovett | 2 | Daughter | — | New Jersey |
| 77 | Russell Lovett | 1 | Son | — | New Jersey |
| 78 | Arthur Ferguson | 27 | Lodger | Farm | Virginia |
| 79 | Sherry Ferguson | 20 | Wife | — | Georgia |
| 80 | Arthur Ferguson | 2 | Son | — | New Jersey |
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)