MF
Mary Farmer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Charles-County, Maryland
Our Model Tree links this Mary Farmer across the 1930 and 1940 US Censuses in Charles-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1919), then head of a 11-person household.
Age 21
b. ~1919
Female
Daughter
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Charles-County, Maryland |
| Surname | Farmer |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Charles |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Elect Dist 4 Allen Fresh |
| 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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Wade Cole | Son | — | 10 | ~1930 |
| Joseph Cole | Son | — | 20 | ~1920 |
| Mary Cole | Spouse | — | 41 | ~1899 |
| Mary Cole | Daughter | — | 4 | ~1936 |
| Joseph Cole | Head | — | 41 | ~1899 |
| John Farmer | Other | — | 43 | ~1897 |
| Helen Farmer | Daughter | — | 2 | ~1938 |
| Mary Farmer | Daughter | — | 21 | ~1919 |
| Joseph Cole | Son | — | 22 | ~1918 |
| James Cole | Son | — | 19 | ~1921 |
| Gertrude Cole | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Charles, Maryland
Daughter, age 11
Charles, Maryland · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Farmer |
| Given Name | Mildred |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Charles-County, Maryland
Daughter, age 21
Charles-County, Maryland · implied b. ~1919 — 11 household members
| Surname | Farmer |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Charles |
| Highest Grade | No 6 |
| 1935 Residence | Maryland |
| 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 Farmer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Farmer
Daughter · 1940 · age 21 · b. ~1919 · Maryland
★ You are viewing this record
Sibling
Gertrude Cole
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Cole
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Cole
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Cole
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wade Cole
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Farmer
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Cole
Sibling · 1940 · age 4
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 — Charles-County, Maryland
Open full size
1940 US Federal Census — Charles-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01546-00144)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Walter M. Rice | 74 | Head | Farmer | Maryland |
| 2 | Francis J. Thomas | 54 | Head | Farmer | Maryland |
| 3 | Elizabeth D. Thomas | 42 | Wife | — | Maryland |
| 4 | Francis Jr. Thomas | 21 | Son | Farmer | Maryland |
| 5 | John W. Thomas | 19 | Son | Laborer | Maryland |
| 6 | Della E. Thomas | 14 | Daughter | — | Maryland |
| 7 | Clara C. Thomas | 11 | Daughter | — | Maryland |
| 8 | Mary B. Thomas | 9 | Daughter | — | Maryland |
| 9 | Mary E. Farmer | 13 | Niece | — | Maryland |
| 10 | Susie R. Farmer | 9 | Niece | — | Maryland |
| 11 | Joseph D. Cole | 41 | Head | Log Cutter | Maryland |
| 12 | Mary A. Cole | 41 | Wife | — | Maryland |
| 13 | Joseph D. Cole | 22 | Son | Log Cutter | Maryland |
| 14 | Joseph O. Cole | 20 | Son | Laborer | Maryland |
| 15 | James D. Cole | 19 | Son | Laborer | Maryland |
| 16 | Gertrude M. Cole | 15 | Daughter | — | Maryland |
| 17 | Wade J. Cole | 10 | Son | — | Maryland |
| 18 | Mary R. Cole | 4 | Daughter | — | Maryland |
| 19 | John F. Farmer | 43 | Son in Law | Laborer | Maryland |
| 20 | Mary E. Farmer THIS PERSON | 21 | Daughter | — | Maryland |
| 21 | Helen R. Farmer | 2 | Daughter | — | Maryland |
| 22 | William H. Earheart | 30 | Head | Carpenter | Virginia |
| 23 | Elsie E. Earheart | 25 | Wife | — | Virginia |
| 24 | Madeline E. Earheart | 3 | Daughter | — | Maryland |
| 25 | William H. Jr. Earheart | 0 | Son | — | Maryland |
| 26 | James F. Cooksey | 58 | Head | Retail Store | Maryland |
| 27 | Mary E. Cooksey | 55 | Wife | — | Maryland |
| 28 | Harry L. Cooksey | 28 | Son | Clerk | Maryland |
| 29 | James F. Cooksey | 18 | Nephew | — | Maryland |
| 30 | Margery E. Finch | 9 | Daughter | — | Maryland |
| 31 | William E. Cooksey | 42 | Head | Farmer | Maryland |
| 32 | Annie L. Cooksey | 45 | Wife | — | Maryland |
| 33 | Elizabeth E. Cooksey | 19 | Daughter | — | Maryland |
| 34 | Charles E. Cooksey | 16 | Son | — | Maryland |
| 35 | Harold R. Cooksey | 14 | Son | — | Maryland |
| 36 | Ferdinand C. Cooksey | 11 | Son | — | Maryland |
| 37 | Mary A. Cooksey | 40 | Cousin | — | Maryland |
| 38 | Henry S. Thompson | 32 | Head | Farmer | Maryland |
| 39 | Martha M. Thompson | 21 | Wife | — | Maryland |
| 40 | Helen D. Thompson | 0 | Daughter | — | 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)