MS
Mary Simpson — 1930 US Census Record
Model Tree available1930 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), with identified parents Howard & Mary — first a daughter (b.~1918), then head of a 13-person household.
Age 12
b. ~1918
Female
Daughter
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Simpson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Maryland |
| 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 | ~1918 |
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.
13 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Simpson | Daughter | — | 4 | ~1926 |
| Mary Simpson | Daughter | — | 12 | ~1918 |
| Catherine Simpson | Daughter | — | 1 | ~1929 |
| Margaret Simpson | Daughter | — | 8 | ~1922 |
| William Simpson | Head | — | 36 | ~1894 |
| Mary Simpson | Other | — | 34 | ~1896 |
| William Simpson | Other | — | 72 | ~1858 |
| Charles Simpson | Son | — | 5 | ~1925 |
| James Simpson | Son | — | 6 | ~1924 |
| William Simpson | Son | — | 14 | ~1916 |
| John Simpson | Son | — | 11 | ~1919 |
| Robert Simpson | Son | — | 10 | ~1920 |
| William Simpson | Son | — | ~1930 |
Census Appearances
1920
Baltimore, Maryland
Daughter, age 3
Baltimore, Maryland · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Daughter, age 12
Baltimore, Maryland · implied b. ~1918 — 13 household members
| Surname | Simpson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
Daughter, age 23
Baltimore-City-County, Maryland · implied b. ~1917 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 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. Identified parents: father Howard Simpson (~0.92 confidence) and mother Mary Simpson (~0.92 confidence) and mother Martha Simpson (~0.92 confidence) and father William Simpson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Howard Simpson
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Mary Simpson
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Martha Simpson
b. ~1891
Source mother
● Household
· direct · ~0.92
Father
William Simpson
b. ~1894
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Simpson
Daughter · 1930 · age 12 · b. ~1918 · Maryland
★ You are viewing this record
Sibling
John Simpson
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Simpson
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Simpson
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Simpson
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Simpson
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Simpson
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Simpson
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Simpson
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Simpson
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
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:1930:15thcensus854unit:0297)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Smith | 28 | Son-in-law | — | Maryland |
| 2 | Barbara Smith | 26 | Daughter | — | Maryland |
| 3 | Henry J. Gernacke | 34 | Head | Engineer | Maryland |
| 4 | Elizabeth C. Gernacke | 26 | Wife-H | Seamstress | Maryland |
| 5 | Timothy Mcaueffe | 37 | Head | Foreman | Maryland |
| 6 | Mary Mcaueffe | 37 | Wife-H | — | Maryland |
| 7 | Robert L. Larmore | 28 | Head | Motorman | Maryland |
| 8 | Eva O. Larmore | 23 | Wife-H | — | Maryland |
| 9 | William Hubrecher | 42 | Head | Clerk | Maryland |
| 10 | Louise Hubrecher | 37 | Wife-H | — | Maryland |
| 11 | Walter Hubrecher | 15 | Daughter | Cashier | Maryland |
| 12 | William C. Hubrecher | 17 | Son | — | Maryland |
| 13 | Edgar J. Simpson | 53 | Head | Underwriter | Maryland |
| 14 | Dorothy J. Simpson | 17 | Daughter-H | — | Maryland |
| 15 | Edgar J. Jr. Simpson | 15 | Son | — | Maryland |
| 16 | William Simpson | 36 | Head | Storekeeper | Maryland |
| 17 | Mary Simpson | 34 | Wife-H | — | Maryland |
| 18 | William Simpson | 14 | Son | — | Maryland |
| 19 | Mary Simpson THIS PERSON | 12 | Daughter | — | Maryland |
| 20 | Robert Simpson | 10 | Son | — | Maryland |
| 21 | Margaret Simpson | 8 | Daughter | — | Maryland |
| 22 | John Simpson | 11 | Son | — | Maryland |
| 23 | James Simpson | 6 | Son | — | Pennsylvania |
| 24 | Charles Simpson | 5 | Son | — | Maryland |
| 25 | Dorothy Simpson | 4 | Daughter | — | Maryland |
| 26 | Catherine Simpson | 1 | Daughter | — | Maryland |
| 27 | William Simpson | 0 | Son | — | Maryland |
| 28 | William Simpson | 72 | Boarder | Carpenter | Sweden |
| 29 | William H. Lumpkin | 29 | Head | Salesman | Maryland |
| 30 | Louise L. Lumpkin | 28 | Wife-H | — | Maryland |
| 31 | Louise L. Lumpkin | 8 | Daughter | — | Maryland |
| 32 | William H. Lumpkin | 3 | Son | — | Maryland |
| 33 | Robert J. Ward | 32 | Head | Truck Driver | Washington D.C. |
| 34 | Edna E. Ward | 34 | Wife-H | — | Maryland |
| 35 | Robert J. Jr. Ward | 12 | Son | — | Estonia |
| 36 | John Ward | 10 | Son | — | Estonia |
| 37 | James Ward | 8 | Son | — | Pennsylvania |
| 38 | Charles Ward | 6 | Son | — | Pennsylvania |
| 39 | John Ray | 36 | Head | Supervisor | Pennsylvania |
| 40 | Lottie B. Ray | 35 | Wife-H | — | Pennsylvania |
| 41 | W. Ray E. Ray | 11 | Son | — | Pennsylvania |
| 42 | Thomas H. Hudson | 44 | Head | Inspector | Maryland |
| 43 | William F. Hudson | 41 | Wife-H | — | Maryland |
| 44 | Ruth A. Hudson | 21 | Daughter | Clerk | Maryland |
| 45 | M. Katherine Hudson | 19 | Daughter | Book-Keeper | Maryland |
| 46 | E. Herbert Hudson | 17 | Son | Assistant Salesman | Maryland |
| 47 | Mary A. Gontrum | 68 | Head-H | — | Maryland |
| 48 | Frank M. Dorsel | 42 | Son-in-law | Machinist | Maryland |
| 49 | Irma M. Dorsel | 42 | Daughter | — | Maryland |
| 50 | William G. Spora | 44 | Head | Roofing | Poland |
Related Census Records
Pedigree Summary
Mary + 9 siblings
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)