MK
Mary Kelley — 1930 US Census Record
Model Tree available1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this Mary Kelley across the 1920, 1930 and 1940 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed), with identified parents William & Mary — first a daughter (b.~1919), then head of a 5-person household.
Age 11
b. ~1919
Female
Daughter
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Kelley |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| 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 |
| Est. Birth Year | ~1919 |
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.
5 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Kelley | Daughter | — | 11 | ~1919 |
| William Kelley | Head | — | 37 | ~1893 |
| William Kelley | Son | — | 13 | ~1917 |
| John Kelley | Son | — | 9 | ~1921 |
| Mary Kelley | Spouse | — | 35 | ~1895 |
Census Appearances
1920
Baltimore, Maryland
Daughter, age 1
Baltimore, Maryland · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kelly |
| Given Name | Mary A |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| 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 11
Baltimore, Maryland · implied b. ~1919 — 5 household members
| Surname | Kelley |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| 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 |
1940
Baltimore-City-County, Maryland
Spouse, age 22
Baltimore-City-County, Maryland · implied b. ~1918 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kelly |
| Given Name | Mary A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore City |
| Highest Grade | H-4 |
| 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 Kelley across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Kelley (~0.92 confidence) and mother Mary Kelley (~0.92 confidence) and father Harry Kelly (~0.92 confidence) and mother Alice Kelly (~0.92 confidence) and mother Cora Westworth (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Kelley
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Mary Kelley
b. ~1895
Source mother
● Household
· direct · ~0.92
Father
Harry Kelly
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Alice Kelly
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Cora Westworth
b. ~1903
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Kelley
Daughter · 1930 · age 11 · b. ~1919 · Maryland
★ You are viewing this record
Sibling
John Kelley
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Kelley
Sibling · 1930 · age 13
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
45 people indexed on this census page (ia:1930:15thcensus850unit:0944)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | John Laughlin | 21 | Head | — | Maryland |
| 52 | Catherine Laughlin | 16 | Sister | — | Maryland |
| 53 | Morris Feldman | 61 | Head | Salesman | Maryland |
| 54 | Sarah Feldman | 55 | Wife | — | Maryland |
| 55 | Theodore Feldman | 25 | Son | Stenographer | Maryland |
| 56 | Theodore Feldman | 23 | Son | Stenographer | Maryland |
| 57 | Arthur Feldman | 18 | Son | Clerk | Maryland |
| 58 | Everett Feldman | 16 | Son | Printer | Maryland |
| 59 | Arthur Kaufman | 57 | Head | Stenographer | Maryland |
| 60 | Eva Kaufman | 55 | Wife | — | Maryland |
| 61 | Elizabeth Kaufman | 27 | Daughter | Calculator | Maryland |
| 62 | Irene Kaufman | 23 | Daughter | Operator | Maryland |
| 63 | William Kaufman | 14 | Son | — | Maryland |
| 64 | Arthur Kaufman | 30 | Son | Driver | New York |
| 65 | Thelma Kaufman | 25 | Wife | — | Maryland |
| 66 | Arthur Kaufman | 9 | Son | — | Maryland |
| 67 | Thelma Kaufman | 7 | Daughter | — | Maryland |
| 68 | William Kaufman | 4 | Son | — | Maryland |
| 69 | John Kelley | 47 | Head | Laborer | Maryland |
| 70 | Mary Kelley | 41 | Wife | — | Maryland |
| 71 | John Kelley | 18 | Son | — | Maryland |
| 72 | Dorothy Kelley | 16 | Daughter | — | Maryland |
| 73 | William Kelley | 47 | Head | Driver | Maryland |
| 74 | Elizabeth Kelley | 45 | Wife | — | Maryland |
| 75 | William Kelley | 16 | Son | — | Maryland |
| 76 | Elizabeth Kelley | 14 | Daughter | — | Maryland |
| 77 | John Kelley | 12 | Son | — | Maryland |
| 78 | Catherine Kelley | 8 | Daughter | — | Maryland |
| 79 | James Kelley | 5 | Son | — | Maryland |
| 80 | John Kelley | 31 | Head | Laborer | Maryland |
| 81 | Mary Kelley | 28 | Wife | — | Maryland |
| 82 | John Kelley | 9 | Son | — | Maryland |
| 83 | Mary Kelley | 8 | Daughter | — | Maryland |
| 84 | William Kelley | 4 | Son | — | Maryland |
| 85 | William Kelley | 37 | Head | Cutter | Maryland |
| 86 | Mary Kelley | 35 | Wife | — | Maryland |
| 87 | William Kelley | 13 | Son | — | Maryland |
| 88 | Mary Kelley THIS PERSON | 11 | Daughter | — | Maryland |
| 89 | John Kelley | 9 | Son | — | Maryland |
| 90 | John Kelley | 55 | Head | Engineer | Ireland |
| 91 | Mary Kelley | 53 | Wife | — | Maryland |
| 92 | John Kelley | 25 | Son | — | Maryland |
| 93 | Mary Kelley | 23 | Daughter | — | Maryland |
| 94 | William Kelley | 21 | Son | — | Maryland |
| 95 | Catherine Kelley | 19 | Daughter | — | Maryland |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 5 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)