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James Monroe — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Frederick-County, Maryland
Our Model Tree links this James Monroe across the 1930 and 1940 US Censuses in Frederick-County, Maryland (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 12-person household.
Age 11
b. ~1929
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Frederick-County, Maryland |
| Surname | Monroe |
| Given Name | James, Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | C |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Brunswick town |
| 1935 Residence (County) | Frederick |
| Additional Details | |
| Highest Grade | No 3 |
| 1935 Residence | Same Place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Brunswick Town |
| Est. Birth Year | ~1929 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Griffin Monroe | Son | — | 3 | ~1937 |
| Joseph Monroe | Son | — | 4 | ~1936 |
| James Monroe | Head | — | 44 | ~1896 |
| George Monroe | Son | — | 8 | ~1932 |
| James Monroe | Son | — | 11 | ~1929 |
| Mary Monroe | Daughter | — | 12 | ~1928 |
| Agnes Monroe | Spouse | — | 40 | ~1900 |
| Julia Monroe | Daughter | — | 15 | ~1925 |
| Helen Monroe | Daughter | — | 7 | ~1933 |
| Alice Monroe | Daughter | — | 14 | ~1926 |
| Virginia Monroe | Daughter | — | 2 | ~1938 |
| Margaret Monroe | Daughter | — | 9 | ~1931 |
Census Appearances
1930
Frederick, Maryland
Son, age
Frederick, Maryland · implied b. ~1930 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Monroe |
| Given Name | Jas. James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Frederick-County, Maryland
Son, age 11
Frederick-County, Maryland · implied b. ~1929 — 12 household members
| Surname | Monroe |
| Given Name | James, Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | C |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Brunswick town |
| 1935 Residence (County) | Frederick |
| Highest Grade | No 3 |
| 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 James Monroe across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Monroe
Son · 1940 · age 11 · b. ~1929 · Maryland
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Sibling
Mary Monroe
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Griffin Monroe
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Monroe
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Monroe
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Monroe
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Julia Monroe
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Monroe
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Monroe
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Monroe
Sibling · 1940 · age 2
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 — Frederick-County, Maryland
Open full size
1940 US Federal Census — Frederick-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01549-00663)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charlotte Lowery | 15 | Daughter | — | Maryland |
| 2 | Margaret Cannon | 19 | Daughter | No | Virginia |
| 3 | Mary Cannon | 0 | Granddaughter | — | Maryland |
| 4 | Udine Myers | 34 | Head | Seamstress | Maryland |
| 5 | Harrison, Ethel Myers | 18 | Sister | — | Maryland |
| 6 | Fred James | 20 | Brother-in-law | Clerk | Maryland |
| 7 | Joseph Wood | 24 | Head | Laborer | Maryland |
| 8 | Catherine Helman | 50 | Housekeeper | Maid | Maryland |
| 9 | Mae Helman | 10 | Daughter | — | Maryland |
| 10 | Jane Helman | 6 | Daughter | — | Maryland |
| 11 | George Brown | 55 | Head | Helper | Maryland |
| 12 | Gertrude Brown | 55 | Wife | — | Maryland |
| 13 | Alma Brown | 19 | Daughter | — | Maryland |
| 14 | Jessie Brown | 17 | Daughter | — | Maryland |
| 15 | John Brown | 16 | Son | — | Maryland |
| 16 | Betty Brown | 12 | Daughter | — | Maryland |
| 17 | Rachel Binterman | 73 | Head | — | Maryland |
| 18 | Lemuel Jackson | 57 | Head | Trucker | Virginia |
| 19 | Louise Jackson | 54 | Wife | — | Maryland |
| 20 | William Jackson | 30 | Son | Laborer | Maryland |
| 21 | James Jackson | 25 | Son | Clerk | Maryland |
| 22 | Charles Jackson | 24 | Son | Clerk | Maryland |
| 23 | Elizabeth Rankins | 14 | Niece | — | Maryland |
| 24 | Mary Rankins | 10 | Niece | — | Maryland |
| 25 | James Monroe | 44 | Head | Trucker | Maryland |
| 26 | Agnes Monroe | 40 | Wife | — | Maryland |
| 27 | Julia Ann Monroe | 15 | Daughter | — | Maryland |
| 28 | Alice Monroe | 14 | Daughter | — | Maryland |
| 29 | Mary E. Monroe | 12 | Daughter | — | Maryland |
| 30 | James, Jr. Monroe THIS PERSON | 11 | Son | — | Maryland |
| 31 | Margaret Monroe | 9 | Daughter | — | Maryland |
| 32 | George Monroe | 8 | Son | — | Maryland |
| 33 | Helen Monroe | 7 | Daughter | — | Maryland |
| 34 | Joseph Monroe | 4 | Son | — | Maryland |
| 35 | Griffin Monroe | 3 | Son | — | Maryland |
| 36 | Virginia Monroe | 2 | Daughter | — | Maryland |
| 37 | John Patrick | 36 | Head | Attendant | Maryland |
| 38 | Laura Patrick | 38 | Wife | — | West Virginia |
| 39 | Thelma Patrick | 16 | Daughter | — | West Virginia |
| 40 | Marlene Patrick | 4 | Daughter | — | Maryland |
Related Census Records
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)