MC
Mary Carroll — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Caroline-County, Maryland
Our Model Tree links this Mary Carroll across the 1920, 1930 and 1940 US Censuses in Caroline-County, Maryland (XGBoost, ~Confirmed) — first a spouse (b.~1899), then head of a 8-person household.
Age 41
b. ~1899
Female
Spouse
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Caroline-County, Maryland |
| Surname | Carroll |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Caroline |
| Additional Details | |
| Highest Grade | W 4 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Fourth Election District |
| Est. Birth Year | ~1899 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Virginia Carroll | Daughter | — | 19 | ~1921 |
| Clinton Carroll | Head | — | 42 | ~1898 |
| Geraldine Carroll | Other | — | ~1940 | |
| Milton Carroll | Son | — | 17 | ~1923 |
| Willie Carroll | Son | — | 11 | ~1929 |
| Aaron Carroll | Son | — | 15 | ~1925 |
| Carrie Carroll | Son | — | 9 | ~1931 |
| Mary Carroll | Spouse | — | 41 | ~1899 |
Census Appearances
1920
Caroline, Maryland
Spouse, age 21
Caroline, Maryland · implied b. ~1899 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | Mary M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Caroline, Maryland
Spouse, age 31
Caroline, Maryland · implied b. ~1899 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | Mary M |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 19 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Caroline-County, Maryland
Spouse, age 41
Caroline-County, Maryland · implied b. ~1899 — 8 household members
| Surname | Carroll |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Caroline |
| Highest Grade | W 4 |
| 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 Carroll across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Carroll
Spouse · 1940 · age 41 · b. ~1899 · Maryland
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Caroline-County, Maryland
Open full size
1940 US Federal Census — Caroline-County, Maryland
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01543-00539)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Richard O Engle | 61 | Head | Farmer | Maryland |
| 42 | Effie Engle | 58 | Wife | — | Kansas |
| 43 | Rena Engle | 30 | Daughter | — | Maryland |
| 44 | Wilbur Engle | 21 | Son | Farm Helper | Maryland |
| 45 | Lee Roy Engle | 18 | Son | Farm Helper | Maryland |
| 46 | Albert Engle | 57 | Head | Farmer | Maryland |
| 47 | Sarah Engle | 50 | Wife | — | Maryland |
| 48 | Irene Engle | 18 | Daughter | — | Maryland |
| 50 | Washington Green | 29 | Head | Laborer | Maryland |
| 51 | Lucille Green | 35 | Wife | — | Maryland |
| 52 | Margaret Lee Green | 6 | Daughter | — | Maryland |
| 53 | Anna Maria Green | 5 | Daughter | — | Maryland |
| 54 | Mary Alice Green | 3 | Daughter | — | Maryland |
| 55 | Raymond Sharp | 40 | Head | Laborer | Maryland |
| 56 | William Friend | 57 | Head | Laborer | Maryland |
| 57 | Maggie Friend | 53 | Wife | — | Maryland |
| 58 | Kenneth Friend | 13 | Grand-son | — | Maryland |
| 59 | Clinton Carroll | 42 | Head | Farmer | Maryland |
| 60 | Mary Carroll THIS PERSON | 41 | Wife | — | Maryland |
| 61 | Virginia Lee Carroll | 19 | Daughter | — | Maryland |
| 62 | Milton Carroll | 17 | Son | Laborer | Maryland |
| 63 | Aaron Carroll | 15 | Son | — | Maryland |
| 64 | Willie Carroll | 11 | Son | — | Maryland |
| 65 | Carrie Carroll | 9 | Son | — | Maryland |
| 66 | Geraldine Marie Carroll | 0 | Grand-daughter | — | Maryland |
| 67 | Joseph O Pritchett | 41 | Head | Farmer | Maryland |
| 68 | Isabel Pritchett | 39 | Wife | — | Maryland |
| 69 | Addison Pritchett | 11 | Son | — | Maryland |
| 70 | Anny Carroll | 72 | Mother-in-law | — | Maryland |
| 71 | Ernest Holland | 53 | Head | Farmer | Maryland |
| 72 | Martha Holland | 44 | Wife | — | Maryland |
| 73 | Nathaniel Holland | 22 | Son | Laborer | Maryland |
| 74 | Walton Holland | 19 | Son | Laborer | Maryland |
| 75 | Fred Holland | 17 | Son | Laborer | Maryland |
| 76 | Ray Holland | 12 | Son | — | Maryland |
| 77 | Webster Holland | 11 | Son | — | Maryland |
| 78 | Lester Holland | 9 | Son | — | Maryland |
| 79 | Leonard Holland | 6 | Son | — | Maryland |
| 80 | Vera Holland | 1 | 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)