MS
Mary Simpson — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this Mary Simpson across the 1920, 1930 and 1940 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed) — first a spouse (b.~1890), then head of a 8-person household.
Age 40
b. ~1890
Female
Spouse
Born: Maryland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Simpson |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 16 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1890 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Alice Simpson | Daughter | — | 18 | ~1912 |
| Henry Simpson | Head | — | 45 | ~1885 |
| William Simpson | Son | — | 14 | ~1916 |
| James Simpson | Son | — | 8 | ~1922 |
| Joseph Simpson | Son | — | 12 | ~1918 |
| Henry Simpson | Son | — | 16 | ~1914 |
| Robert Simpson | Son | — | 10 | ~1920 |
| Mary Simpson | Spouse | — | 40 | ~1890 |
Census Appearances
1920
Baltimore, Maryland
Spouse, age 30
Baltimore, Maryland · implied b. ~1890 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | Mary P. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Spouse, age 40
Baltimore, Maryland · implied b. ~1890 — 8 household members
| Surname | Simpson |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 16 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Head, age 50
Baltimore-City-County, Maryland · implied b. ~1890 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | Mabel B |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | Nurse |
| Industry | Hospital |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 436 |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Simpson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Simpson
Spouse · 1930 · age 40 · b. ~1890 · Maryland
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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 — Baltimore, Maryland
Open full size
1930 US Federal Census — Baltimore, Maryland
Page Contents
50 people indexed on this census page (ia:1930:15thcensus864unit:0712)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Barbara Schmidt | 22 | Daughter | Stitcher | Pennsylvania |
| 2 | Helen Schmidt | 20 | Daughter | — | Maryland |
| 3 | Harry Schmidt | 20 | Son | Proprietor | Maryland |
| 4 | Mary Schmidt | 1 | Gd. Son | — | Maryland |
| 5 | Virginia Schmidt | 22 | Boarder | — | Virginia |
| 6 | Lilly Massey | 55 | Head | Cook | North Carolina |
| 7 | Arthur Massey | 25 | Son | — | North Carolina |
| 8 | Julia Anderson | 81 | Mother-in-l | — | North Carolina |
| 9 | James De Vane | 33 | Boarder | Stevedore | South Carolina |
| 10 | Joseph Flynn | 27 | Head | Retail Merchant | New York |
| 11 | Thelma Flynn | 25 | Wife | Salesman | New York |
| 12 | Mary E. Flynn | 3 | Daughter | — | New York |
| 13 | Thelma Flynn | 1 | Daughter | — | New York |
| 14 | Ernest Brown | 42 | Head | — | Maryland |
| 15 | Ida Brown | 42 | Wife | — | Maryland |
| 16 | Henry B. Simpson | 45 | Head | — | North Carolina |
| 17 | Mary E. Simpson THIS PERSON | 40 | Wife | — | Maryland |
| 18 | Alice Simpson | 18 | Daughter | — | Maryland |
| 19 | Henry Simpson | 16 | Son | — | Maryland |
| 20 | William Simpson | 14 | Son | — | Maryland |
| 21 | Joseph Simpson | 12 | Son | — | Maryland |
| 22 | Robert Simpson | 10 | Son | — | Maryland |
| 23 | James Simpson | 8 | Son | — | Maryland |
| 24 | Lulu Hegmoth | 56 | Head | — | Germany |
| 25 | Lulu Hegmoth | 27 | Daughter | Manager | Maryland |
| 26 | Martha Hegmoth | 23 | Daughter | — | Maryland |
| 27 | Henry J. Dabler | 58 | Head | Carpenter | Maryland |
| 28 | Annie M. Dabler | 58 | Wife | — | District of Columbia |
| 29 | Henry J. Dabler | 21 | Son | — | Maryland |
| 30 | James L. Dabler | 18 | Son | — | Maryland |
| 31 | John Spruill | 50 | Head | Cook | Maryland |
| 32 | Mary Spruill | 50 | Wife | Cook | New Hampshire |
| 33 | Mary Drummond | 53 | Head | — | Maryland |
| 34 | Joseph Simms | 65 | Head | Carpenter | District of Columbia |
| 35 | Charles E. Simms | 25 | Son | Mechanic | Maryland |
| 36 | William G. Simms | 22 | Son | — | Maryland |
| 37 | Frederick Payne | 72 | Head | Cleaner | Maryland |
| 38 | Beatrice Payne | 71 | Wife | — | Maryland |
| 39 | George A. Simmons | 35 | Head | Sand Blaster | Maryland |
| 40 | Emma Simmons | 30 | Wife | — | Maryland |
| 41 | Ida Simmons | 12 | Daughter | — | Maryland |
| 42 | Alice Simmons | 11 | Daughter | — | Maryland |
| 43 | Charles Simmons | 10 | Son | — | Maryland |
| 44 | Elizabeth Simmons | 9 | Daughter | — | Maryland |
| 45 | Virginia Simmons | 5 | Daughter | — | Maryland |
| 46 | Catherine Simmons | 2 | Daughter | — | Maryland |
| 47 | George Simmons | 1 | Son | — | Maryland |
| 48 | Lilly Trump | 53 | Head | Conductor | Maryland |
| 49 | Elizabeth Rogers | 29 | Boarder | House Keeper | Maryland |
| 50 | Mary | 14 | Boarder | — | Maryland |
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)