MS
Mary Simms — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Prince-George'S-County, Maryland
Our Model Tree links this Mary Simms across the 1930 and 1940 US Censuses in Prince-George'S-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 9-person household.
Age 14
b. ~1926
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Prince-George'S-County, Maryland |
| Surname | Simms |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | ED 8 |
| 1935 Residence (County) | Prince George |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | 2 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Ed 8 |
| Est. Birth Year | ~1926 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Simms | Daughter | — | 14 | ~1926 |
| Thomas Simms | Son | — | 12 | ~1928 |
| Calvin Simms | Son | — | 12 | ~1928 |
| Edward Simms | Head | — | 49 | ~1891 |
| Elmore Simms | Spouse | — | 34 | ~1906 |
| Joseph Simms | Son | — | 23 | ~1917 |
| Delphine Simms | Daughter | — | 20 | ~1920 |
| James Simms | Son | — | 17 | ~1923 |
| Alfred Simms | Son | — | 19 | ~1921 |
Census Appearances
1930
Prince Georges, …
Daughter, age 4
Prince Georges, Maryland · implied b. ~1926 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simms |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Prince-George'S-County, Maryland
Daughter, age 14
Prince-George'S-County, Maryland · implied b. ~1926 — 9 household members
| Surname | Simms |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | ED 8 |
| 1935 Residence (County) | Prince George |
| Income (1939) | 0 |
| Highest Grade | 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 Mary Simms across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Simms
Daughter · 1940 · age 14 · b. ~1926 · Maryland
★ You are viewing this record
Sibling
James Simms
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Simms
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Calvin Simms
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alfred Simms
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Simms
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Delphine Simms
Sibling · 1940 · age 20
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 — Prince-George'S-County, Maryland
Open full size
1940 US Federal Census — Prince-George'S-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01556-00804)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | George A. Stewart | 37 | Head | Farmer | Maryland |
| 42 | Martha Stewart | 40 | Wife | — | Maryland |
| 43 | Katherine Stewart | 13 | Daughter | — | Maryland |
| 44 | George Stewart | 10 | Son | — | Maryland |
| 45 | Rebecca Stewart | 9 | Daughter | — | Maryland |
| 46 | Joseph Stewart | 7 | Son | — | Maryland |
| 47 | Martha Stewart | 4 | Daughter | — | Maryland |
| 48 | Mcclatter Fowler | 78 | Head | — | Maryland |
| 49 | James Scully | 80 | Head | — | Maryland |
| 50 | Anna S. Scully | 70 | Wife | — | Maryland |
| 51 | Barbra Enshme | 72 | Sister-in-law | — | Maryland |
| 52 | Joseph Tippett | 41 | Head | Farmer | Maryland |
| 53 | Betty Tippett | 34 | Wife | — | Maryland |
| 54 | Patrick Tippett | 15 | Daughter | — | Maryland |
| 55 | Mable Tippett | 13 | Daughter | — | Maryland |
| 56 | Joseph Tippett | 11 | Son | — | Maryland |
| 57 | Edward Tippett | 9 | Son | — | Maryland |
| 58 | Francis Tippett | 5 | Son | — | Maryland |
| 59 | Martha Tippett | 3 | Daughter | — | Maryland |
| 60 | Leon Sr. Turner | 36 | Head | Farmer | Maryland |
| 61 | Agnes Turner | 24 | Wife | — | Maryland |
| 62 | Anna Turner | 5 | Daughter | — | Maryland |
| 63 | Leona Turner | 3 | Daughter | — | Maryland |
| 64 | Leon Jr. Turner | 1 | Son | — | Maryland |
| 65 | Edward Simms | 49 | Head | Farmer | Maryland |
| 66 | Elmore Simms | 34 | Wife | — | Maryland |
| 67 | Joseph Simms | 23 | Son | Farmer | Maryland |
| 68 | Delphine Simms | 20 | Daughter | Farmer | Maryland |
| 69 | Alfred Simms | 19 | Son | Farmer | Maryland |
| 70 | James Simms | 17 | Son | Farmer | Maryland |
| 71 | Mary Simms THIS PERSON | 14 | Daughter | — | Maryland |
| 72 | Calvin Simms | 12 | Son | — | Maryland |
| 73 | Thomas Simms | 12 | Son | — | Maryland |
| 74 | George L. Turner | 30 | Head | Farmer | Maryland |
| 75 | Louise Turner | 29 | Wife | — | Maryland |
| 76 | George L. Jr. Turner | 8 | Son | — | Maryland |
| 77 | Donald Turner | 6 | Son | — | Maryland |
| 78 | James Turner | 4 | Son | — | Maryland |
| 79 | John L. Turner | 2 | Son | — | Maryland |
| 80 | Hammond Gray | 49 | Head | Laborer | 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)