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Isaac Jackson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Montgomery-County, Pennsylvania
Our Model Tree links this Isaac Jackson across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Allie & Isaac — first a son (b.~1913), then head of a 11-person household.
Age 27
b. ~1913
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Pennsylvania |
| Surname | Jackson |
| Given Name | Isaac Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Cheltenham T. |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Occupation | Laborer |
| Industry | Building Construction |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 330 |
| Highest Grade | 8 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Laborer |
| Township / Ward | Cheltenham T |
| Est. Birth Year | ~1913 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Isaac | Age | Birth yr |
|---|---|---|---|---|
| Ruth Jackson | Daughter | — | 17 | ~1923 |
| Adelle Jackson | Daughter | — | 12 | ~1928 |
| Dolores Henry | Other | — | 4 | ~1936 |
| Otis Jackson | Son | — | 23 | ~1917 |
| Leola Jackson | Daughter | — | 21 | ~1919 |
| Lelia Jackson | Spouse | — | 45 | ~1895 |
| Esther Jackson | Daughter | — | 15 | ~1925 |
| Isaac Jackson | Head | — | 50 | ~1890 |
| Florence Henry | Daughter | — | 25 | ~1915 |
| Robert Jackson | Son | — | 10 | ~1930 |
| Isaac Jackson | Son | — | 27 | ~1913 |
Census Appearances
1920
Montgomery, Pennsylvania
Son, age 6
Montgomery, Pennsylvania · implied b. ~1914 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jackson |
| Given Name | Israel |
| Relationship to Head | son |
| Sex | M |
| Color / Race | Black |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Virginia |
| Mother's Birthplace | District Columbia |
| Occupation | none |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Montgomery, Pennsylvania
Son, age 17
Montgomery, Pennsylvania · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jackson |
| Given Name | Israel |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Virginia |
| Mother's Birthplace | District of Columbia |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Montgomery-County, Pennsylvania
Son, age 27
Montgomery-County, Pennsylvania · implied b. ~1913 — 11 household members
| Surname | Jackson |
| Given Name | Isaac Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Cheltenham T. |
| 1935 Residence (County) | Montgomery |
| Occupation | Laborer |
| Industry | Building Construction |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 330 |
| Highest Grade | 8 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Isaac Jackson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Allie Jackson (~0.92 confidence) and father Isaac Jackson (~0.92 confidence) and mother Ida Jackson (~0.92 confidence) and mother Lelia Jackson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Allie Jackson
b. ~1889
Source father
● Household
· direct · ~0.92
Father
Isaac Jackson
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Ida Jackson
b. ~1896
Source mother
● Household
· direct · ~0.92
Mother
Lelia Jackson
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Isaac Jackson
Son · 1940 · age 27 · b. ~1913 · Pennsylvania
★ You are viewing this record
Sibling
Ruth Jackson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Jackson
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leola Jackson
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Henry
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Adelle Jackson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Otis Jackson
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Esther Jackson
Sibling · 1940 · age 15
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 — Montgomery-County, Pennsylvania
Open full size
1940 US Federal Census — Montgomery-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03577-00701)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | W. Mae Harris | 37 | Head | — | Florida |
| 2 | Jean Harris | 16 | Daughter | — | Pennsylvania |
| 3 | Joan Harris | 16 | Daughter | — | Pennsylvania |
| 4 | W. Mae Harris | 3 | Daughter | — | Florida |
| 5 | Philip M. Staley | 47 | Head | Trucker | Pennsylvania |
| 6 | Eugenia Staley | 47 | Wife | — | Pennsylvania |
| 7 | Joseph Staley | 17 | Son | Clerk | Pennsylvania |
| 8 | Eugenia M. Staley | 12 | Daughter | — | Pennsylvania |
| 9 | Thomas P. Fletcher | 50 | Head | Salesman | Pennsylvania |
| 10 | Albert L. Fletcher | 56 | Brother | Gardener | Pennsylvania |
| 11 | Bertha Jones | 50 | Head | Laundress | Pennsylvania |
| 12 | Robert Whitley | 51 | Lodger | Butler | Virginia |
| 13 | William W. Moore | 24 | Head | — | Virginia |
| 14 | Lula Moore | 55 | Wife | — | Virginia |
| 15 | Catherine Moore | 22 | Niece | Maid | Virginia |
| 16 | Jennie Moore | 13 | Step-daughter | — | Virginia |
| 17 | Isaac Sr. Jackson | 50 | Head | Gardener | Virginia |
| 18 | Lelia Jackson | 45 | Wife | — | Virginia |
| 19 | Isaac Jr. Jackson THIS PERSON | 27 | Son | Laborer | Pennsylvania |
| 20 | Otis Jackson | 23 | Son | Laborer | Pennsylvania |
| 21 | Leola Jackson | 21 | Daughter | Maid | Pennsylvania |
| 22 | Ruth Jackson | 17 | Daughter | Maid | Pennsylvania |
| 23 | Esther Jackson | 15 | Daughter | — | Pennsylvania |
| 24 | Adelle Jackson | 12 | Daughter | — | Pennsylvania |
| 25 | Robert Jackson | 10 | Son | — | Pennsylvania |
| 26 | Florence Henry | 25 | Daughter | Maid | Pennsylvania |
| 27 | Dolores Henry | 4 | Grand-daughter | — | Pennsylvania |
| 28 | William L. Jennings | 55 | Head | Laborer | Virginia |
| 29 | Lola Jennings | 45 | Wife | — | Virginia |
| 30 | Roy Jr. Jennings | 25 | Son | Gardener | Pennsylvania |
| 31 | Roberta Jennings | 24 | Daughter-in-law | — | North Carolina |
| 32 | Roy 3Rd Jennings | 4 | Grand-son | — | Pennsylvania |
| 33 | William Jennings | 1 | Grand-son | — | Pennsylvania |
| 34 | George Bishop | 26 | Head | Laborer | Pennsylvania |
| 35 | Clara Bishop | 23 | Wife | Maid | Pennsylvania |
| 36 | Dolores Bishop | 4 | Daughter | — | Pennsylvania |
| 37 | Sylvia Bishop | 2 | Daughter | — | Pennsylvania |
| 38 | Elijah R. Rhodes | 45 | Head | Janitor | Virginia |
| 39 | Elma Rhodes | 37 | Wife | Maid | Virginia |
| 40 | Ivery Pritchard | 22 | Brother-in-law | — | Virginia |
Related Census Records
Pedigree Summary
Isaac + 7 siblings
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)