John Mcmahon — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Ramsey-County, Minnesota

Our Model Tree links this John Mcmahon across the 1920, 1930 and 1940 US Censuses in Ramsey-County, Minnesota (XGBoost, ~Confirmed) — first a head (b.~1888), then head of a 4-person household.

Age 52 b. ~1888 Male Head Born: Wisconsin Married

1940 Census Record Details

Census Year	1940
Location	Ramsey-County, Minnesota
Surname	McMahon
Given Name	John E
Relationship to Head	Head
Sex	M
Color / Race	White
Age	52
Marital Status	Married
Birthplace	Wisconsin
1935 Residence (City)	St. Paul City
1935 Residence (County)	Ramsey
Additional Details
Occupation	Purchasing agent
Industry	Steam railroad company
Class of Worker	PW
Hours Worked	44
Income (1939)	136
Highest Grade	H-4
1935 Residence	Same place
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin
Occupation	Purchasing Agent
Township / Ward	St Paul City
Est. Birth Year	~1888

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.

4 people recorded at the same address in the 1940 census.

Name	Relation to head	Relative to John	Age	Birth yr
Joan Mcmahon	Daughter	—	20	~1920
John Mcmahon	Head	—	52	~1888
John Mcmahon	Son	—	24	~1916
Clara Mcmahon	Spouse	—	52	~1888

Census Appearances

1920

Ramsey, Minnesota

Head, age 35

Ramsey, Minnesota · implied b. ~1885 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	McMahon
Given Name	John E.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	35
Marital Status	Married
Birthplace	Wisconsin
Father's Birthplace	Wisconsin
Mother's Birthplace	Ireland
Occupation	none
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Home Owned/Rented	R
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin

1930

Ramsey, Minnesota

Head, age 45

Ramsey, Minnesota · implied b. ~1885 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	McMahon
Given Name	John G
Relationship to Head	Head
Sex	M
Color / Race	White
Age	45
Marital Status	Married
Birthplace	Wisconsin
Age at First Marriage	31
Father's Birthplace	Minnesota
Mother's Birthplace	Ireland Irish
Occupation	Purchasing Agt
Industry	Railway
Class of Worker	W
Can Read/Write	Yes
Home Owned/Rented	O
Home Value / Rent	6000
Radio Set	R
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin

1940

Ramsey-County, Minnesota

Head, age 52

Ramsey-County, Minnesota · implied b. ~1888 — 4 household members

Surname	McMahon
Given Name	John E
Relationship to Head	Head
Sex	M
Color / Race	White
Age	52
Marital Status	Married
Birthplace	Wisconsin
1935 Residence (City)	St. Paul City
1935 Residence (County)	Ramsey
Occupation	Purchasing agent
Industry	Steam railroad company
Class of Worker	PW
Hours Worked	44
Income (1939)	136
Highest Grade	H-4
1935 Residence	Same place
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin

Model Tree

Linked across censuses

Our Model Tree links John Mcmahon across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.

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This person

Anchor record

John Mcmahon

Head · 1940 · age 52 · b. ~1888 · Minnesota

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Confirmed / household (~0.90+) Probable / derived (~0.65–0.89) Candidate (<0.65, unverified)

Original Census Page

1940 US Federal Census — Ramsey-County, Minnesota Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01996-00585)

Line	Name	Age	Relation	Occupation	Birthplace
1	Robert Hamp	23	Son	Salesclerk	Minnesota
2	Elizabeth Hamp	15	Daughter	—	Minnesota
3	John Hilger	50	Head	Book Binding	Minnesota
4	Gertrude Hilger	44	Wife	—	Minnesota
5	Marie Hilger	26	Daughter	Labeler	Minnesota
6	Anna Hilger	75	Mother	—	Germany
7	Thomas Mcdermott	24	Head	Service Attendant	Minnesota
8	Ethel Mcdermott	23	Wife	—	Minnesota
9	Thomas Jr Mcdermott	2	Son	—	Minnesota
10	Carol Ethel Mcdermott	1	Daughter	—	Minnesota
11	Patrick Mcdermott	0	Son	—	Minnesota
12	Berndt Jacobson	20	Head	Machinist	Minnesota
13	Wilma Jacobson	18	Wife	—	Minnesota
14	Robert Jacobson	1	Son	—	Minnesota
15	David J Wruck	36	Head	Butcher	Minnesota
16	Gertrude Wruck	33	Wife	—	Wisconsin
17	Leonard Wruck	13	Son	—	Minnesota
18	David Jr Wruck	12	Son	—	Minnesota
19	Paul P Weber	36	Head	Upholsterer	Germany
20	Erma Weber	33	Wife	—	Germany
21	Richard Weber	8	Son	—	Minnesota
22	Mary Lou Weber	6	Daughter	—	Minnesota
23	Pauline Weber	3	Daughter	—	Minnesota
24	Mathilda Johnson	32	Lodger	Registered Nurse	North Dakota
25	Adeline Lupry	30	Lodger	Waitress	Minnesota
26	John E Mcmahon THIS PERSON	52	Head	Purchasing Agent	Wisconsin
27	Clara Mcmahon	52	Wife	—	Minnesota
28	John Mcmahon	24	Son	Radio Engineer	Minnesota
29	Joan Mcmahon	20	Daughter	—	Minnesota
30	Owen J Judge	46	Head	Auditor	Minnesota
31	Rowena Judge	43	Wife	—	Indiana
32	Margaret Judge	10	Daughter	—	Minnesota
33	Owen Jr Judge	7	Son	—	Minnesota
34	Philip Schwanekamp	60	Head	Bartender	Michigan
35	Sadie Schwanekamp	50	Wife	—	Minnesota
36	Eliza Petter	52	Head	Power Machine Operator	Minnesota
37	Martha Petter	50	Sister	Hand Wrapper	Minnesota
38	Christine Petter	45	Sister	—	Minnesota
39	Daniel W O'Dea	54	Head	Book Binder	Minnesota
40	Kathryn O'Dea	48	Wife	—	Minnesota

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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)

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