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James Mcmahon — 1930 US Census Record
Model Tree available1930 United States Federal Census · Jackson, Missouri
Our Model Tree links this James Mcmahon across the 1920, 1930 and 1940 US Censuses in Jackson, Missouri (XGBoost, ~Confirmed), with identified parents James & Minnie — first a head (b.~1899), then head of a 3-person household.
Age 31
b. ~1899
Male
Head
Born: Missouri
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Jackson, Missouri |
| Surname | McMahon |
| Given Name | James D |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Missouri |
| Age at First Marriage | 22 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Missouri |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | $22 |
| Veteran | R |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Farmer |
| Township / Ward | Washington Township |
| Est. Birth Year | ~1899 |
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 1930 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| James Mcmahon | Head | — | 31 | ~1899 |
| Helen Mcmahon | Other | — | 30 | ~1900 |
| Harry Mcmahon | Son | — | 4 | ~1926 |
Census Appearances
1920
Jackson, Missouri
Son, age 21
Jackson, Missouri · implied b. ~1899 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | James Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Missouri |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
Jackson, Missouri
Head, age 31
Jackson, Missouri · implied b. ~1899 — 3 household members
| Surname | McMahon |
| Given Name | James D |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Missouri |
| Age at First Marriage | 22 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Missouri |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | $22 |
| Veteran | R |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Cass-County, Missouri
Head, age 41
Cass-County, Missouri · implied b. ~1899 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mc Mahon |
| Given Name | James D |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Jackson |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Missouri |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Mcmahon across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Mcmahon (~0.92 confidence) and mother Minnie Mcmahon (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Mcmahon
b. ~1869
Source father
● Household
· direct · ~0.92
Mother
Minnie Mcmahon
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Mcmahon
Head · 1930 · age 31 · b. ~1899 · Missouri
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Jackson, Missouri
Open full size
1930 US Federal Census — Jackson, Missouri
Page Contents
50 people indexed on this census page (ia:1930:missouricensus00reel1204:0895)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Earl Gunnell | 22 | Son | Farm Hand | Oklahoma |
| 2 | Alta M Gunnell | 14 | Daughter | None | Missouri |
| 3 | Vincent Kurzweil | 61 | Head | Farmer | Austria |
| 4 | Bertha Kurzweil | 58 | Wife-H | None | Missouri |
| 5 | Anna Kurzweil | 18 | Daughter | None | Missouri |
| 6 | George Mcmahon | 29 | Head | Farmer | Missouri |
| 7 | Wilma Mcmahon | 22 | Wife-H | None | Kansas |
| 8 | Vera L Mcmahon | 2 | Daughter | None | Missouri |
| 9 | James D Mcmahon THIS PERSON | 31 | Head | Farmer | Missouri |
| 10 | Helen M Mcmahon | 30 | Wife-H | None | Missouri |
| 11 | Harry E Mcmahon | 4 | Son | None | Missouri |
| 12 | James Mcmahon | 60 | Head | Farmer | England |
| 13 | Minnie Mcmahon | 52 | Wife-H | None | Missouri |
| 14 | Bruce E Mcmahon | 25 | Son | Farmer | Missouri |
| 15 | Frances Mcmahon | 16 | Daughter | None | Missouri |
| 16 | Geo F Butcher | 52 | Head | Farmer | Missouri |
| 17 | Ethel Butcher | 41 | Wife-H | None | Missouri |
| 18 | James Butcher | 16 | Son | None | Missouri |
| 19 | Thelma Butcher | 20 | Daughter | None | Missouri |
| 20 | Levi W Rollins | 69 | Head | Farmer | Missouri |
| 21 | Malvina Rollins | 65 | Wife-H | None | Tennessee |
| 22 | John A Rollins | 28 | Son | Farmer | Missouri |
| 23 | Leonard W Welsh | 56 | Head | Manager | Illinois |
| 24 | Mary E Welsh | 46 | Wife-H | None | Iowa |
| 25 | Willard Welsh | 9 | Son | None | Kansas |
| 26 | William R Mclin | 38 | Head | Agent & Telegrph | Missouri |
| 27 | Letha Mclin | 33 | Wife-H | None | Missouri |
| 28 | Juanita L Mclin | 10 | Daughter | None | Missouri |
| 29 | Richard Mclin | 7 | Son | None | Missouri |
| 30 | Thomas J Lewis | 51 | Head | Farmer | Missouri |
| 31 | Emma W Lewis | 48 | Wife-H | None | Missouri |
| 32 | Oliver D Lewis | 22 | Son | Farmer | Missouri |
| 33 | Carson E Lewis | 16 | Son | None | Missouri |
| 34 | Ruth A Lewis | 15 | Daughter | None | Missouri |
| 35 | Angie N Lewis | 13 | Son | None | Idaho |
| 36 | Claud T Vaughan | 43 | Head | Attendant | Missouri |
| 37 | Mary E Vaughan | 40 | Wife-H | None | Missouri |
| 38 | Geo W Mcnair | 70 | Head | None | Arkansas |
| 39 | Cymatia Mcnair | 58 | Wife-H | None | Missouri |
| 40 | Johnson W Mcnair | 13 | Son | None | Arkansas |
| 41 | Bernice W Mcnair | 20 | Daughter | None | Texas |
| 42 | William J Dean | 35 | Head | Bookkeeper | Kansas |
| 43 | Barbara E Dean | 30 | Wife-H | None | Kansas |
| 44 | Dorothy Dean | 7 | Daughter | None | Missouri |
| 45 | Marjorie Dean | 5 | Daughter | None | Missouri |
| 46 | James R Reynolds | 31 | Head | Mechanic | Michigan |
| 47 | Clara H Reynolds | 35 | Sister-H | None | Missouri |
| 48 | Logan M Stamper | 44 | Head | Manager | Missouri |
| 49 | Lula J Stamper | 40 | Wife-H | None | Arkansas |
| 50 | Betty L Stamper | 11 | Daughter | None | Missouri |
Pedigree Summary
James
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 1930 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)