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Mary Mcmillan — 1900 US Census Record
Linked across censuses1900 United States Federal Census · Weld, Colorado
Our Model Tree links this Mary Mcmillan across the 1900 and 1910 US Censuses in Weld, Colorado (XGBoost, ~Confirmed) — first a spouse (b.~1866), then head of a 8-person household.
Age 34
b. ~1866
Female
Spouse
Born: Illinois
Married
1900 Census Record Details
| Census Year | 1900 |
| Location | Weld, Colorado |
| Surname | McMillan |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Illinois |
| Birth Month | Nov |
| Birth Year | 1866 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Precinct 28 |
| Est. Birth Year | ~1866 |
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.
8 people recorded at the same address in the 1900 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| May Mcmillan | Daughter | — | 8 | ~1892 |
| William Mcmillan | Son | — | 17 | ~1883 |
| Walter Mcmillan | Son | — | 5 | ~1895 |
| Frank Mcmillan | Son | — | 2 | ~1898 |
| Thomas Mcmillan | Head | — | 55 | ~1845 |
| Robert Mcmillan | Son | — | 10 | ~1890 |
| Mary Mcmillan | Spouse | — | 34 | ~1866 |
| Martha Mcmillan | Daughter | — | 4 | ~1896 |
Census Appearances
1900
Weld, Colorado
Spouse, age 34
Weld, Colorado · implied b. ~1866 — 8 household members
| Surname | McMillan |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Illinois |
| Birth Month | Nov |
| Birth Year | 1866 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Maryland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1910
Weld, Colorado
Spouse, age 42
Weld, Colorado · implied b. ~1868 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMillen |
| Given Name | Mary B |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Illinois |
| Years Married | 21 |
| Children Born | 12 |
| Children Living | 10 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Maryland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Mary Mcmillan across 2 US Census years (1900 and 1910) in Weld, Colorado, using XGBoost record linkage.
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This person
Anchor record
Mary Mcmillan
Spouse · 1900 · age 34 · b. ~1866 · Colorado
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1900 US Federal Census — Weld, Colorado
Open full size
1900 US Federal Census — Weld, Colorado
Page Contents
23 people indexed on this census page (ia:1900:12thcensusofpopu130unit:0656)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Temple A Kirk | 27 | Head | Farm Laborer | Colorado |
| 52 | Vincent H Kirk | 21 | Brother | Farm Laborer | Colorado |
| 53 | Robert D Curtis | 23 | Servant | Farm Laborer | Colorado |
| 54 | Thomas J Mcmillan | 54 | Head | Farmer | Missouri |
| 55 | Mary E Mcmillan THIS PERSON | 33 | Wife | — | Illinois |
| 56 | William C Mcmillan | 17 | Son | Farm Laborer | Colorado |
| 57 | Robert M Mcmillan | 9 | Son | At School | Colorado |
| 58 | May O Mcmillan | 7 | Daughter | At School | Colorado |
| 59 | Walter Mcmillan | 5 | Son | — | Colorado |
| 60 | Martha A Mcmillan | 3 | Daughter | — | Colorado |
| 61 | Frank W Mcmillan | 1 | Son | — | Colorado |
| 62 | William J Young | 59 | Head | Farmer | Indiana |
| 63 | Minerva Young | 58 | Wife | — | Indiana |
| 64 | Christopher Young | 15 | Son | At School | Denmark |
| 65 | Edward G Llewellyn | 30 | Head | Hay Baler | Ohio |
| 66 | Mary Llewellyn | 26 | Wife | — | New York |
| 67 | Walter J Llewellyn | 7 | Son | At School | Colorado |
| 68 | Milton F Llewellyn | 5 | Son | — | Colorado |
| 69 | Leonard J Llewellyn | 1 | Son | — | Colorado |
| 70 | Phillip Smith | 19 | Servant | Farm Laborer | Russia |
| 71 | Samuel J Gregory | 71 | Head | Hostler | Indiana |
| 72 | Maria Gregory | 68 | Wife | — | Indiana |
| 73 | Alexander Mcdougall | 56 | Head | Farmer | Scotland |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1900 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)