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John Roach — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this John Roach across the 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 8-person household.
Age 14
b. ~1926
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Roach |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same house |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Doris Roach | Daughter | — | 11 | ~1929 |
| John Roach | Head | — | 35 | ~1905 |
| John Roach | Son | — | 14 | ~1926 |
| Donald Roach | Son | — | 4 | ~1936 |
| David Roach | Son | — | 1 | ~1939 |
| Kenneth Roach | Son | — | 8 | ~1932 |
| George Roach | Son | — | 16 | ~1924 |
| Magdalene Roach | Spouse | — | 36 | ~1904 |
Census Appearances
1930
Baltimore, Maryland
Son, age 5
Baltimore, Maryland · implied b. ~1925 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Rocco |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Italy |
| Mother's Birthplace | Italy |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Son, age 14
Baltimore-City-County, Maryland · implied b. ~1926 — 8 household members
| Surname | Roach |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Class of Worker | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same house |
| 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 Roach across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Roach
Son · 1940 · age 14 · b. ~1926 · Maryland
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Sibling
David Roach
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Roach
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Roach
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Roach
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kenneth Roach
Sibling · 1940 · age 8
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 — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01534-00222)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Oscar Sheppard | 14 | son | — | Maryland |
| 42 | Evelyn Sheppard | 11 | daughter | — | Maryland |
| 43 | Daniel Sheppard | 7 | son | — | Maryland |
| 44 | Leon Sheppard | 5 | son | — | Maryland |
| 45 | John S Roach | 35 | Head | Cook | Maryland |
| 46 | Magdalene Roach | 36 | wife | — | Maryland |
| 47 | George Roach | 16 | son | — | Maryland |
| 48 | John Roach THIS PERSON | 14 | son | — | Maryland |
| 49 | Doris Roach | 11 | daughter | — | Maryland |
| 50 | Kenneth Roach | 8 | son | — | Maryland |
| 51 | Donald Roach | 4 | son | — | Maryland |
| 52 | David Roach | 1 | son | — | Maryland |
| 53 | Robert Lee Rogers | 23 | Head | Chauffer | N. Carolina |
| 54 | Minnie V. Rogers | 21 | wife | — | Maryland |
| 55 | Shirley Rogers | 4 | daughter | — | Maryland |
| 56 | Robert, Jr Rogers | 2 | son | — | Maryland |
| 57 | John Greenwood | 43 | Head | Laborer | Maryland |
| 58 | Clara Greenwood | 39 | wife | — | Maryland |
| 59 | John, Jr Greenwood | 15 | son | — | Maryland |
| 61 | Willie Williams | 57 | Head | Laborer | S. Carolina |
| 62 | Mary Lou Williams | 53 | wife | Ironer | Georgia |
| 63 | Mattie Carter | 45 | Head | — | Georgia |
| 64 | James Carr | 45 | lodger | Laborer | Maryland |
| 65 | Jr. James | 22 | lodger | Laborer | Maryland |
| 66 | Columbus Hines | 58 | lodger | Junking | Maryland |
| 67 | James Koon | 41 | Head | Longshoreman | S. Carolina |
| 68 | Rose L. Koon | 59 | wife | — | Maryland |
| 69 | Florence Frederick | 63 | Head | Stockkeeper | At Sea |
| 70 | Gabriel Frederick | 43 | son | Stockkeeper | Maryland |
| 71 | Lillian Fritz | 50 | Head | — | Maryland |
| 72 | Charles Fritz | 50 | son | Packer | Maryland |
| 73 | George Fritz | 25 | son | Laborer | Maryland |
| 74 | Victoria Baker | 33 | Head | — | Virginia |
| 75 | George Regal | 28 | lodger | Attendant | Penna |
| 76 | Annie Baker | 13 | daughter | — | Maryland |
| 77 | Earl H Baker | 9 | son | — | Maryland |
| 78 | James W. Buchanan | 34 | Head | Fireman | Maryland |
| 79 | Mary C. Buchanan | 52 | mother | — | Maryland |
| 80 | Joseph W Buchanan | 19 | brother | Scraper | 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)