JP
John Porter — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this John Porter across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed), with identified parents James & James — first a head (b.~1909), then head of a 3-person household.
Age 31
b. ~1909
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Porter |
| Given Name | John Emory |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | Chemist |
| Industry | Exterminating |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1600 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Chemist |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1909 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Porter | Head | — | 31 | ~1909 |
| Robert Porter | Son | — | 5 | ~1935 |
| Mary Porter | Spouse | — | 26 | ~1914 |
Census Appearances
1920
X, Maryland
Son, age 11
X, Maryland · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Porter |
| Given Name | John C |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 21
Baltimore, Maryland · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Porter |
| Given Name | John E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Clerk |
| Industry | Bank |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Head, age 31
Baltimore-City-County, Maryland · implied b. ~1909 — 3 household members
| Surname | Porter |
| Given Name | John Emory |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | Chemist |
| Industry | Exterminating |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1600 |
| Highest Grade | Hs 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 Porter across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father James Porter (~0.92 confidence) and father James Porter (~0.92 confidence) and mother Annie Porter (~0.92 confidence) and mother Susie Porter (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Porter
b. ~1876
Source father
● Household
· direct · ~0.92
Father
James Porter
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Annie Porter
b. ~1879
Source mother
● Household
· direct · ~0.92
Mother
Susie Porter
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Porter
Head · 1940 · age 31 · b. ~1909 · Maryland
★ 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 — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01540-00832)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Stock | 57 | Head | Presser | Lithuania |
| 2 | Anna Stock | 52 | Wife | Seamstress | Lithuania |
| 3 | Viola Stock | 17 | Daughter | — | Maryland |
| 4 | James Elkin | 50 | Son in law | Own Business | Lithuania |
| 5 | Kelly James | 48 | Head | Checker | Maryland |
| 6 | Helen James | 47 | Wife | — | Maryland |
| 7 | William James | 10 | Son | — | Maryland |
| 8 | Henry Walther | 58 | Head | Adjuster | Maryland |
| 9 | Hattie Walther | 56 | Wife | — | Maryland |
| 10 | John Emory Porter THIS PERSON | 31 | Head | Chemist | Maryland |
| 11 | Mary Fraudo Porter | 26 | Wife | — | Maryland |
| 12 | Robert Fraudo Porter | 5 | Son | — | Maryland |
| 13 | Emory Johnson | 47 | Head | Trucker | Maryland |
| 14 | Mary Johnson | 48 | Wife | — | Maryland |
| 15 | Joseph Fletcher | 25 | Son in law | Carpenter | Maryland |
| 16 | Mary Jane Fletcher | 21 | Daughter | — | Maryland |
| 17 | Mildred C. Fletcher | 3 | Grand dau | — | Maryland |
| 18 | George Bull | 24 | Head | Silver Finisher | Maryland |
| 19 | Dorothy A. Bull | 23 | Wife | — | Maryland |
| 20 | Joan Bull | 7 | Daughter | — | Maryland |
| 21 | Benedict Hanson | 73 | Head | — | Maryland |
| 22 | Charles Richards | 36 | Head | Mechanic | Maryland |
| 23 | Margaret Richards | 37 | Wife | — | Maryland |
| 24 | Allline Richards | 15 | Daughter | — | Maryland |
| 25 | Ida R. Richards | 13 | Daughter | — | Maryland |
| 26 | Herbert Buchman | 53 | Head | Stock Clerk | Maryland |
| 27 | Elsie Buchman | 56 | Wife | — | Maryland |
| 28 | George Bull | 61 | Head | Cement Finisher | Maryland |
| 29 | Grace Bull | 63 | Wife | — | Maryland |
| 30 | Mary B. Ecker | 68 | Head | Seamstress | Maryland |
| 31 | Herbert Ecker | 34 | Son | Elevator Operator | Maryland |
| 32 | Phillip Dannelley | 30 | Head | Signal Man | Maryland |
| 33 | Christine Dannelley | 29 | Wife | — | Ohio |
| 34 | Phillip Dannelley | 3 | Son | — | Maryland |
| 35 | Nancy Dannelley | 3 | Daughter | — | Maryland |
| 36 | Oscar Jr. Schumacher | 24 | Head | — | Maryland |
| 37 | Mary J. Schumacher | 23 | Wife | — | Maryland |
| 38 | William Schumacher | 3 | Son | — | Maryland |
| 39 | Mary L. Schumacher | 2 | Daughter | — | Maryland |
| 40 | Oscar Sr. Schumacher | 51 | Head | Brick Layer | New York |
Pedigree Summary
John
Gen 1 · 4 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)