JM
John Mccarthy — 1940 US Census Record
Model Tree available1940 United States Federal Census · District-Of-Columbia-County, District of Columbia
Our Model Tree links this John Mccarthy across the 1920, 1930 and 1940 US Censuses in District-Of-Columbia-County, District of Columbia (XGBoost, ~Confirmed), with identified parents Robert & Super — first a head (b.~1898), then head of a 7-person household.
Age 42
b. ~1898
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | District-Of-Columbia-County, District of Columbia |
| Surname | McCarthy |
| Given Name | John Albin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Washington City |
| 1935 Residence (County) | District Of Columbia |
| Additional Details | |
| Occupation | Dr. Fireman |
| Industry | Fire Dept |
| Class of Worker | GW |
| Hours Worked | 70 |
| Income (1939) | 2400 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Dr. Fireman |
| Township / Ward | Washington City |
| Est. Birth Year | ~1898 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Mccarthy | Head | — | 42 | ~1898 |
| Minnie Jobson | Other | — | 63 | ~1877 |
| Elmer Baum | Other | — | 39 | ~1901 |
| Elmer Mccarthy | Son | — | 13 | ~1927 |
| John Mccarthy | Son | — | 12 | ~1928 |
| John Mccarthy | Son | — | 18 | ~1922 |
| Sarah Mccarthy | Spouse | — | 40 | ~1900 |
Census Appearances
1920
District Of …
Son, age 22
District Of Columbia, District of Columbia · implied b. ~1898 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | John A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Clerk |
| Industry | Trust Co. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
None, District …
Head, age 32
None, District of Columbia · implied b. ~1898 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | John A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 23 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Fireman |
| Industry | Fire Dept. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25 |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
District-Of-Columbia-County, District …
Head, age 42
District-Of-Columbia-County, District of Columbia · implied b. ~1898 — 7 household members
| Surname | McCarthy |
| Given Name | John Albin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Washington City |
| 1935 Residence (County) | District Of Columbia |
| Occupation | Dr. Fireman |
| Industry | Fire Dept |
| Class of Worker | GW |
| Hours Worked | 70 |
| Income (1939) | 2400 |
| Highest Grade | H-4 |
| 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 John Mccarthy across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Robert Mccarthy (~0.92 confidence) and mother Super Mccarthy (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Mccarthy
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Super Mccarthy
b. ~1873
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mccarthy
Head · 1940 · age 42 · b. ~1898 · District of Columbia
★ 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 — District-Of-Columbia-County, District of Columbia
Open full size
1940 US Federal Census — District-Of-Columbia-County, District of Columbia
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00564-00706)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John M. Cole | 38 | Head | Stationary Engineer | Florida |
| 2 | Pauline Cole | 41 | Wife | Clerk | Maryland |
| 3 | Anna Beatrice Cole | 7 | Daughter | — | Dist of Col |
| 4 | John Albin Mccarthy THIS PERSON | 42 | Head | Dr. Fireman | Maryland |
| 5 | Sarah D. Mccarthy | 40 | Wife | — | Dist of Col |
| 6 | John Ernest Mccarthy | 18 | Son | — | Dist of Col |
| 7 | Elmer R. Mccarthy | 13 | Son | — | Dist of Col |
| 8 | John Mccarthy | 12 | Son | — | Dist of Col |
| 9 | Elmer Baum | 39 | Son in Law | Upholsterer | Dist of Col |
| 10 | Minnie A. Jobson | 63 | Aunt | — | Dist of Col |
| 11 | J. Ellis Overlade | 48 | Head | Chief Accountant | Utah |
| 12 | Linda S. Overlade | 47 | Wife | — | Utah |
| 13 | Dan C. Overlade | 12 | Son | — | Dist of Col |
| 14 | Dante S. Mercurio | 35 | Head | Clerk | Dist of Col |
| 15 | Elena M. Mercurio | 30 | Wife | — | Italy |
| 16 | Dante A. Mercurio | 7 | Son | — | Dist of Col |
| 17 | Elmer B. Wallace | 52 | Head | Foreman Printer | Oklahoma |
| 18 | Anne R. Wallace | 50 | Wife | Telephone Operator | Virginia |
| 19 | Laura E. Jirkle | 47 | Sister in Law | Housekeeper | Virginia |
| 20 | Elmer B. Jr. Wallace | 19 | Son | — | Oklahoma |
| 21 | Walter B. Mace | 25 | Head | Draftsman | Montana |
| 22 | Myrtle F. Mace | 23 | Wife | — | Montana |
| 23 | George E. Altmann | 42 | Head | Civil Engineer | Dist of Col |
| 24 | Isabel G. Altmann | 43 | Wife | — | Dist of Col |
| 25 | George J. Altmann | 21 | Son | — | Dist of Col |
| 26 | Walter T. Altmann | 20 | Son | — | Dist of Col |
| 27 | Mary B. Altmann | 16 | Daughter | — | Dist of Col |
| 28 | Perry C. Hardesty | 35 | Head | Switch Board Repairman | Maryland |
| 29 | Lili G. Hardesty | 36 | Wife | Clerk | England |
| 30 | John W. Simms | 34 | Head | Salesman | Tennessee |
| 31 | Helen K. Simms | 33 | Wife | Graduate Nurse | Maryland |
| 32 | John W. Simms | 9 | Son | — | Dist of Col |
| 33 | Denton L. Settle | 40 | Housekeeper | Housekeeper | Virginia |
| 34 | John W. Schwenk | 65 | Head | Machinist | Dist of Col |
| 35 | Louise F. Schwenk | 60 | Wife | — | Dist of Col |
| 36 | Frank F. Bress | 74 | Uncle | — | Dist of Col |
| 37 | Florence B. Wilbur | 43 | Head | Clerk | Wisconsin |
| 38 | Marjorie J. Wilbur | 22 | Wife | Typist | Indiana |
| 39 | Albert G. Coffe | 36 | Lodger | Clerk | Maryland |
| 40 | Robert E. Coffe | 25 | Lodger | Clerk | New York |
Pedigree Summary
John
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)