RJ
Ruth Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Ruth Johnson across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed), with identified parents Aliza — first a daughter (b.~1919), then head of a 6-person household.
Age 21
b. ~1919
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Johnson |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | domestic |
| Industry | private family |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 480 |
| Highest Grade | No 4-320 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Domestic |
| Township / Ward | Baltimore City |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ruth | Age | Birth yr |
|---|---|---|---|---|
| Alice Johnson | Daughter | — | 13 | ~1927 |
| Ruth Johnson | Daughter | — | 21 | ~1919 |
| Rollyn Johnson | Daughter | — | 12 | ~1928 |
| Aliza Johnson | Head | — | 51 | ~1889 |
| Charles Johnson | Son | — | 16 | ~1924 |
| William Johnson | Son | — | 28 | ~1912 |
Census Appearances
1920
X, Maryland
Other, age 1
X, Maryland · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Ruth |
| Relationship to Head | boarder |
| Sex | F |
| Color / Race | Black |
| 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
Other, age 11
Baltimore, Maryland · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Ruth |
| Relationship to Head | Sister-in-law |
| Sex | F |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Virginia |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Daughter, age 21
Baltimore-City-County, Maryland · implied b. ~1919 — 6 household members
| Surname | Johnson |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | domestic |
| Industry | private family |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 480 |
| Highest Grade | No 4-320 |
| 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 Ruth Johnson across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: mother Aliza Johnson (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Aliza Johnson
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ruth Johnson
Daughter · 1940 · age 21 · b. ~1919 · Maryland
★ You are viewing this record
Sibling
Charles Johnson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Johnson
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Johnson
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rollyn Johnson
Sibling · 1940 · age 12
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
1940 US Federal Census — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01526-00536)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Daisey Compton | 46 | Head | Laundry | Maryland |
| 2 | Josephine Harris | 16 | Daughter | — | Maryland |
| 3 | Edith Harris | 12 | Daughter | — | Maryland |
| 4 | James Harris | 17 | Son | — | Maryland |
| 5 | Norman Mitchell | 48 | Head | Laborer | North Carolina |
| 6 | Ella Mitchell | 46 | Wife | — | North Carolina |
| 7 | George Mitchell | 24 | Son | — | North Carolina |
| 8 | John Mitchell | 20 | Son | Laborer | North Carolina |
| 9 | Francis Mitchell | 9 | Son | — | Maryland |
| 10 | Normie Newman | 21 | Daughter | — | North Carolina |
| 11 | Thomas Newman | 27 | Son-in-law | — | New Jersey |
| 12 | Elaine Newman | 2 | Granddaughter | Presser | Maryland |
| 13 | Thomas Newman | 2 | Grandson | — | Maryland |
| 14 | James Garvey | 26 | Boarder | Domestic | North Carolina |
| 15 | Mary Montgomery | 39 | Head | Laborer | North Carolina |
| 16 | Herbert Montgomery | 22 | Son | Farm Hand | Maryland |
| 17 | Albert Montgomery | 19 | Son | — | Maryland |
| 18 | Herbert Montgomery | 14 | Son | — | Maryland |
| 19 | Evelyne Montgomery | 8 | Daughter | — | Maryland |
| 20 | Clarence Montgomery | 5 | Son | — | Maryland |
| 21 | Alvin Montgomery | 4 | Son | — | Maryland |
| 22 | Bertha Montgomery | 20 | Daughter | — | Virginia |
| 23 | Samuel Taylor | 50 | Head | Paper Hanger | Virginia |
| 24 | Catherine Taylor | 32 | Wife | Domestic | Maryland |
| 25 | Aliza Johnson | 51 | Head | Hostess | Maryland |
| 26 | William Johnson | 28 | Son | Porter | Maryland |
| 27 | Ruth Johnson THIS PERSON | 21 | Daughter | Domestic | Maryland |
| 28 | Charles Johnson | 16 | Son | — | Maryland |
| 29 | Alice Johnson | 13 | Daughter | — | Maryland |
| 30 | Rollyn Johnson | 12 | Daughter | — | Maryland |
| 31 | Frank Carter | 20 | Head | — | District of Columbia |
| 32 | Mary Carter | 19 | Wife | — | Maryland |
| 33 | Barbara Carter | 5 | Daughter | — | Maryland |
| 34 | Isabelle Neal | 55 | Lodger | — | Maryland |
| 35 | Samuel Green | 57 | Lodger | — | Maryland |
| 36 | Clara E. Mcquinton | 63 | Head | — | Maryland |
| 37 | Lidie Davis | 39 | Daughter | Laborer | Maryland |
| 38 | Martha Wilson | 35 | Daughter | — | Maryland |
| 39 | Marshall Quinton | 29 | Son | — | Maryland |
| 40 | Matthew Davis | 33 | Son-in-law | Laborer | Maryland |
Pedigree Summary
Ruth + 4 siblings
Gen 1 · 1 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)