MJ
Martha Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Martha Johnson across the 1910, 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a head (b.~1891), then head of a 3-person household.
Age 49
b. ~1891
Female
Head
Born: Maryland
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Johnson |
| Given Name | Martha |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | Black |
| Age | 49 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Highest Grade | No 2 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1891 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Martha | Age | Birth yr |
|---|---|---|---|---|
| Martha Johnson | Head | — | 49 | ~1891 |
| Lorrain Carter | Other | — | 12 | ~1928 |
| Raymond Carter | Son | — | 32 | ~1908 |
Census Appearances
1910
Baltimore, Maryland
Other, age 20
Baltimore, Maryland · implied b. ~1890 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Martha |
| Relationship to Head | lodger |
| Sex | F |
| Color / Race | Black |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Maryland |
| Children Living | Maryland |
| Father's Birthplace | Maryland |
| Occupation | Private family |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1920
None, Maryland
Other, age 30
None, Maryland · implied b. ~1890 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Martha |
| Relationship to Head | lodger |
| Sex | F |
| Color / Race | Black |
| Age | 30 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Maid |
| Industry | Private family |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Head, age 41
Baltimore, Maryland · implied b. ~1889 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Martha |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | Black |
| Age | 41 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| Age at First Marriage | 17 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laundress |
| Industry | At home |
| Class of Worker | O |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 30 |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Head, age 49
Baltimore-City-County, Maryland · implied b. ~1891 — 3 household members
| Surname | Johnson |
| Given Name | Martha |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | Black |
| Age | 49 |
| Marital Status | Widowed |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Highest Grade | No 2 |
| 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 Martha Johnson across 4 US Census years (1910, 1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
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This person
Anchor record
Martha Johnson
Head · 1940 · age 49 · b. ~1891 · Maryland
★ You are viewing this record
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-t0627-01530-00130)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Daniel Griffin | 6 | Son | — | Maryland |
| 42 | Edward Griffin | 5 | Son | — | Maryland |
| 43 | Walter Griffin | 2 | Son | — | Maryland |
| 44 | Paul Wilkins | 23 | Head | Laborer | Virginia |
| 45 | Cordelia Wilkins | 24 | Wife | — | Maryland |
| 46 | Amanda Wilkins | 0 | Daughter | — | Maryland |
| 47 | George Rustin | 47 | Head | Laborer | Maryland |
| 48 | Myrtle Mitchell | 25 | Housekeeper | Housework | Maryland |
| 49 | Alexander Nichols | 55 | Head | Proprietor | Maryland |
| 50 | Clara Nichols | 54 | Wife | Janitress | Maryland |
| 51 | Amelia Brooks | 70 | Head | — | Maryland |
| 52 | Joseph Jackson | 69 | Head | — | Maryland |
| 53 | James Jackson | 52 | Cousin | — | Maryland |
| 54 | Mary Hardy | 55 | Head | — | Virginia |
| 55 | Alexander Hill | 21 | Son-in-law | Stevedore | Maryland |
| 56 | Bell S. Hill | 27 | Daughter | — | Virginia |
| 57 | John Jackson | 65 | Lodger | Stevedore | Maryland |
| 58 | Joseph Thomas | 61 | Lodger | Laborer | Maryland |
| 59 | Louis Glazer | 28 | Head | Proprietor | Poland |
| 60 | Anna Glazer | 28 | Wife | — | Russia |
| 61 | Milton Glazer | 2 | Son | — | Maryland |
| 62 | Harold I. Glazer | 2 | Son | — | Maryland |
| 63 | Rose Sapp | 32 | Sister | Tailoress | Russia |
| 64 | John Kitchen | 52 | Head | Laborer | South Carolina |
| 65 | Hattie Kitchen | 49 | Wife | — | South Carolina |
| 66 | Preston J. Kitchen | 24 | Son | Laborer | South Carolina |
| 67 | Ralam Kitchen | 17 | Son | — | South Carolina |
| 68 | Dorothy Kitchen | 11 | Daughter | — | South Carolina |
| 69 | Alexander Freeman | 25 | Son-in-law | Laborer | Maryland |
| 70 | Mary E. Freeman | 21 | Daughter | Maid | South Carolina |
| 71 | Leroy Freeman | 7 | Grandson | — | Maryland |
| 72 | Ellwood Freeman | 5 | Grandson | — | Maryland |
| 73 | Wallace Freeman | 2 | Grandson | — | Maryland |
| 74 | Betty Prather | 49 | Head | — | Virginia |
| 75 | Robert L. Connell | 29 | Son | Laborer | Maryland |
| 76 | Robert L. Jr. Connell | 10 | Grandson | — | Maryland |
| 77 | Edith Connell | 8 | Daughter | — | Maryland |
| 78 | Martha Johnson THIS PERSON | 49 | Head | — | Maryland |
| 79 | Raymond Carter | 32 | Son | Stevedore | Maryland |
| 80 | Lorrain J. Carter | 12 | Granddaughter | — | Maryland |
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)