MP
Mary Pierce — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Mary Pierce across the 1900, 1910, 1920 and 1930 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1874), then head of a 7-person household.
Age 56
b. ~1874
Female
Spouse
Born: Ireland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Pierce |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1892 |
| Age at First Marriage | 18 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1874 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Pierce | Daughter | — | 24 | ~1906 |
| Margaret Pierce | Daughter | — | 19 | ~1911 |
| Charles Pierce | Head | — | 58 | ~1872 |
| Everett Pierce | Son | — | 23 | ~1907 |
| Thomas Pierce | Son | — | 22 | ~1908 |
| Charles Pierce | Son | — | 17 | ~1913 |
| Mary Pierce | Spouse | — | 56 | ~1874 |
Census Appearances
1900
Cook, Illinois
Spouse, age 22
Cook, Illinois · implied b. ~1878 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pierce |
| Given Name | Mollie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Ireland |
| Birth Month | May |
| Birth Year | 1878 |
| Year of Immigration | 1893 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | house wife |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
Cook, Illinois
Spouse, age 34
Cook, Illinois · implied b. ~1876 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pierce |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 12 |
| Children Born | 5 |
| Children Living | 4 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
Cook, Illinois
Spouse, age 45
Cook, Illinois · implied b. ~1875 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pierce |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1890 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Birth Country | Ireland |
| Year of Naturalization | 1900 |
| Birthplace (normalized) | ireland |
1930
Cook, Illinois
Spouse, age 56
Cook, Illinois · implied b. ~1874 — 7 household members
| Surname | Pierce |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1892 |
| Age at First Marriage | 18 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| 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 Mary Pierce across 4 US Census years (1900, 1910, 1920 and 1930) in Cook, Illinois, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Pierce
Spouse · 1930 · age 56 · b. ~1874 · Illinois
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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 — Cook, Illinois
Open full size
1930 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel463:0375)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles Pierce | 58 | Head | — | Ireland |
| 2 | Mary Pierce THIS PERSON | 56 | Wife | — | Ireland |
| 3 | Dorothy Pierce | 24 | Daughter | Stenographer | Illinois |
| 4 | Everett Pierce | 23 | Son | Clerk | Illinois |
| 5 | Thomas Pierce | 22 | Son | Salesman | Illinois |
| 6 | Margaret Pierce | 19 | Daughter | — | Illinois |
| 7 | Charles Pierce | 17 | Son | — | Illinois |
| 8 | Walter D Tabb | 71 | Head | Accountant | New York |
| 9 | Alice Tabb | 62 | Wife | — | New York |
| 10 | Althea Kane | 50 | Boarder | Stenographer | Illinois |
| 11 | Mabel Sullivan | 47 | Boarder | Stenographer | Illinois |
| 12 | — | 41 | — | — | Wisconsin |
| 13 | — | 45 | — | — | Indiana |
| 14 | — | 45 | — | — | Illinois |
| 15 | Ada | 19 | — | — | Illinois |
| 16 | — | 18 | — | — | Illinois |
| 17 | — | 21 | — | — | Michigan |
| 18 | Mary | 50 | Head | — | Ireland |
| 19 | Margaret | 25 | Daughter | — | Illinois |
| 20 | Alice | 23 | Daughter | — | Illinois |
| 21 | James | 17 | Son | — | Illinois |
| 22 | — | 15 | — | — | Illinois |
| 23 | — | 13 | — | — | Illinois |
| 24 | — | 11 | — | — | Illinois |
| 25 | Michael Mccormick | 52 | Head | Clerk | Illinois |
| 26 | Juliet Mccormick | 50 | Wife | — | Illinois |
| 27 | Katherine Dring | 33 | Head | Dressmaker | Illinois |
| 28 | Gertrude Dring | 31 | Sister | Clerk | Illinois |
| 29 | Alice Dring | 33 | Sister | Clerk | Illinois |
| 30 | Grace Dring | 27 | Sister | Clerk | Illinois |
| 31 | Ruth Dring | 25 | Sister | — | Illinois |
| 32 | Austin H Johnston | 30 | Head | — | Illinois |
| 33 | Lillian Johnston | 30 | Wife | Bookkeeper | Illinois |
| 34 | James Johnston | 5 | Son | — | Illinois |
| 35 | Eleanor Johnston | 1 | Daughter | — | Illinois |
| 36 | — | 62 | Head | — | Germany |
| 37 | — | 61 | Wife | — | Wisconsin |
| 38 | — | 32 | Son | — | Illinois |
| 39 | — | 28 | Daughter | — | Illinois |
| 40 | — | 20 | Daughter | — | Illinois |
| 41 | — | 43 | Head | Broker | Illinois |
| 42 | — | 27 | Wife | — | Canada-English |
| 43 | — | 3 | Daughter | — | Canada-English |
| 44 | James Loretto | 50 | Head | Doctor | Illinois |
| 45 | Jessie Loretto | 39 | Wife | — | Illinois |
| 46 | — | 30 | Head | Teacher | Illinois |
| 47 | Margaret | 20 | Daughter | — | Illinois |
| 48 | Lillian | 15 | Daughter | — | Illinois |
| 49 | Margaret | 13 | Daughter | — | Illinois |
| 50 | Frances | 11 | Daughter | — | Illinois |
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)