JM
James Mccormick — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this James Mccormick across the 1900, 1910, 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1880), then head of a 7-person household.
Age 50
b. ~1880
Male
Head
Born: Ireland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | McCormick |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1890 |
| Age at First Marriage | 25 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Fireman |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Irish |
| Home Owned/Rented | R |
| Home Value / Rent | 20 |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Fireman |
| Township / Ward | Chelmsford Town |
| Est. Birth Year | ~1880 |
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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Annie Mccormick | Daughter | — | 11 | ~1919 |
| James Mccormick | Head | — | 50 | ~1880 |
| Joseph Mccormick | Son | — | 21 | ~1909 |
| Walter Mccormick | Son | — | 16 | ~1914 |
| James Mccormick | Son | — | 23 | ~1907 |
| Edward Mccormick | Son | — | 14 | ~1916 |
| Mary Mccormick | Spouse | — | 47 | ~1883 |
Census Appearances
1900
Middlesex, Massachusetts
Other, age 25
Middlesex, Massachusetts · implied b. ~1875 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormick |
| Given Name | James |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Ireland |
| Birth Month | Jun |
| Birth Year | 1875 |
| Naturalization Status | Alien |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
Middlesex, Massachusetts
Head, age 33
Middlesex, Massachusetts · implied b. ~1877 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormick |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 9 |
| Year of Immigration | 1894 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Farmer |
| Industry | General Farm |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
Middlesex, Massachusetts
Head, age 42
Middlesex, Massachusetts · implied b. ~1878 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormick |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1892 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Beamer |
| Industry | Cotton Mill |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Year of Naturalization | 1900 |
| Birthplace (normalized) | ireland |
1930
Middlesex, Massachusetts
Head, age 50
Middlesex, Massachusetts · implied b. ~1880 — 7 household members
| Surname | McCormick |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1890 |
| Age at First Marriage | 25 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Fireman |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Irish |
| Home Owned/Rented | R |
| Home Value / Rent | 20 |
| 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 James Mccormick across 4 US Census years (1900, 1910, 1920 and 1930) in Middlesex, Massachusetts, using XGBoost record linkage.
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This person
Anchor record
James Mccormick
Head · 1930 · age 50 · b. ~1880 · Massachusetts
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
42 people indexed on this census page (ia:1930:15thcensuspopula917unit:0774)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph Lalonde | 45 | Head | Builder | Canada-French |
| 2 | Ida Lalonde | 45 | Wife | — | Canada-French |
| 3 | Laura E Lalonde | 20 | Daughter | Stenographer | Massachusetts |
| 4 | Charlotte Lalonde | 18 | Daughter | — | Massachusetts |
| 5 | Henry R Lalonde | 16 | Son | Printer | Massachusetts |
| 6 | Romeo J Lalonde | 14 | Son | — | Massachusetts |
| 7 | Gertrude E Lalonde | 12 | Daughter | — | Massachusetts |
| 8 | Roland J Lalonde | 11 | Son | — | Massachusetts |
| 9 | Adeline Lalonde | 10 | Daughter | — | Massachusetts |
| 10 | Armand J Lalonde | 9 | Son | — | Massachusetts |
| 11 | James Mccormick THIS PERSON | 50 | Head | Fireman | Ireland |
| 12 | Mary V Mccormick | 47 | Wife | — | Ireland |
| 13 | James J Mccormick | 23 | Son | Truck Driver | Massachusetts |
| 14 | Joseph A Mccormick | 21 | Son | Laborer | Massachusetts |
| 15 | Walter J Mccormick | 16 | Son | Laborer | Massachusetts |
| 16 | Edward J Mccormick | 14 | Son | — | Massachusetts |
| 17 | Annie F Mccormick | 11 | Daughter | — | Massachusetts |
| 18 | Francis J Mccormick | 49 | Head | Farmer | Ireland |
| 19 | John E Mccormick | 21 | Son | Farmer | Massachusetts |
| 20 | Arthur L Mccormick | 19 | Son | Farmer | Massachusetts |
| 21 | Bridget V Mccormick | 67 | Daughter | — | Ireland |
| 22 | Samuel R Mitchell | 45 | Head | Carpenter | Massachusetts |
| 23 | Margaret E Mitchell | 40 | Wife | — | Massachusetts |
| 24 | Ralph S Mitchell | 18 | Son | — | Massachusetts |
| 25 | Frederick A Mitchell | 12 | Son | — | Massachusetts |
| 26 | Howard E Mitchell | 9 | Son | — | Massachusetts |
| 27 | Robert Mitchell | 7 | Son | — | Massachusetts |
| 28 | Albert Mitchell | 5 | Son | — | Massachusetts |
| 29 | Patrick J Sullivan | 73 | Head | Machinist | Massachusetts |
| 30 | Catherine Sullivan | 73 | Wife | — | Massachusetts |
| 31 | Catherine Ann Sullivan | 43 | Daughter | — | Massachusetts |
| 32 | Ellen J Sullivan | 42 | Daughter | — | Massachusetts |
| 33 | William F Sullivan | 38 | Son | — | Massachusetts |
| 34 | Bernard R Sullivan | 36 | Son | — | Massachusetts |
| 35 | James Sullivan | 34 | Son | — | Massachusetts |
| 36 | Alice Sullivan | 32 | Daughter | — | Massachusetts |
| 37 | John P O'Neil | 37 | Head | Farmer | Massachusetts |
| 38 | Mary O'Neil | 33 | Wife | — | Massachusetts |
| 39 | John O'Neil | 7 | Son | — | Massachusetts |
| 40 | James W Thompson | 35 | Head | Painter | Scotland |
| 41 | Mary Macdonald | 57 | Head | — | Ireland |
| 42 | Mary Macdonald | 25 | Daughter | — | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)