John Farrell — 1940 US Census Record

Model Tree available

1940 United States Federal Census · Baltimore-City-County, Maryland

Our Model Tree links this John Farrell across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed), with identified parents John — first a head (b.~1866), then head of a 4-person household.

Age 74 b. ~1866 Male Head Born: Maryland Married

1940 Census Record Details

Census Year	1940
Location	Baltimore-City-County, Maryland
Surname	Farrell
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	74
Marital Status	Married
Birthplace	Maryland
1935 Residence (City)	Baltimore City
1935 Residence (County)	Baltimore City
Additional Details
Highest Grade	No 8
1935 Residence	Same place
Birth State	Maryland
Birth Country	United States
Birthplace (normalized)	maryland
Township / Ward	Baltimore City
Est. Birth Year	~1866

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
John Farrell	Head	—	74	~1866
John Farrell	Son	—	31	~1909
William Farrell	Son	—	29	~1911
Majella Farrell	Spouse	—	36	~1904

Census Appearances

1920

X X, …

Son, age 45

X X, Maryland · implied b. ~1875 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Farrell
Given Name	John
Relationship to Head	son
Sex	M
Color / Race	White
Age	45
Marital Status	Single
Birthplace	Maryland
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Occupation	Clerk
Industry	Real Estate
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Maryland
Birth Country	United States
Birthplace (normalized)	maryland

1930

Baltimore, Maryland

Other, age 60

Baltimore, Maryland · implied b. ~1870 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Farrell
Given Name	John J.
Relationship to Head	Brother-in-law
Sex	M
Color / Race	White
Age	60
Marital Status	Single
Birthplace	Maryland
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Can Read/Write	Yes
Birth State	Maryland
Birth Country	United States
Birthplace (normalized)	maryland

1940

Baltimore-City-County, Maryland

Head, age 74

Baltimore-City-County, Maryland · implied b. ~1866 — 4 household members

Surname	Farrell
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	74
Marital Status	Married
Birthplace	Maryland
1935 Residence (City)	Baltimore City
1935 Residence (County)	Baltimore City
Highest Grade	No 8
1935 Residence	Same place
Birth State	Maryland
Birth Country	United States
Birthplace (normalized)	maryland

Model Tree

Model Tree available

Our Model Tree links John Farrell across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father John Farrell (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.

Show:

Gen 1 Parents confidence ≈ 0.92

Father

John Farrell

b. ~1849

Source father

● Household · direct · ~0.92

This person

Anchor record

John Farrell

Head · 1940 · age 74 · b. ~1866 · 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

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01532-00423)

Line	Name	Age	Relation	Occupation	Birthplace
1	Patricia J. Layden	12	daughter	—	Maryland
2	Margaret Mcdermott	67	Head	—	Maryland
3	Albert D. Mcdermott	29	son	Inspector	Maryland
4	Florice B. Mcdermott	31	daughter	Typist	Maryland
5	Nellie Maloney	39	Head	—	Maryland
6	Lenora Maloney	36	sister	—	Maryland
7	Irene Sunderland	16	lodger	—	Maryland
8	Rosilea Sunderland	13	lodger	—	Maryland
9	Josephine Brown	14	lodger	—	Maryland
10	Mary Nealis	11	lodger	—	Maryland
11	William Schmidt	27	Head	Mechanic	Maryland
12	Lillian Schmidt	26	wife	—	Maryland
13	Joan Schmidt	7	daughter	—	Maryland
14	William Schmidt	5	son	—	Maryland
15	John Farrell THIS PERSON	74	Head	—	Maryland
16	Majella Farrell	36	wife	Traffic Manager	Maryland
17	John J. Farrell	31	son	—	Maryland
18	William Farrell	29	son	—	Maryland
19	Henry Zinck	54	Head	Clerk	Maryland
20	Clara Zinck	52	wife	—	Maryland
21	Walter Zinck	25	son	Clerk	Maryland
22	Dolores Zinck	20	daughter	Stock Clerk	Maryland
23	Robert E. Mccaig	50	Head	Clerk	Massachusetts
24	Katheryn Mccaig	47	wife	—	Massachusetts
25	Robert Mccaig	22	son	Warehouse Clerk	Massachusetts
26	Eleanor Mccaig	20	daughter	Saleslady	Massachusetts
27	George Mccaig	19	son	Clerk Retail	Massachusetts
28	Donald Mccaig	17	son	Clerk	Massachusetts
29	David Mccaig	17	son	New Worker	Massachusetts
30	Samuel Fager	56	Head	Passenger Dept	Maryland
31	Pauline Fager	50	wife	—	New York
32	John Snyder	49	Head	Clerk	Maryland
33	Margaret Johnson	56	sister	—	Maryland
34	Edward A. Johnson	30	nephew	Foreman	Maryland
35	Theresa G. Johnson	25	niece	Clerk	Maryland
36	Doris Johnson	21	niece	Telephone Operator	Maryland
37	Mary Johnson	19	niece	—	Maryland
38	Steven Getz	30	lodger	Truck Driver	Maryland
39	William S. Campbell	56	Head	Mechanic	Pennsylvania
40	Grace Campbell	54	wife	—	Pennsylvania

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Pedigree Summary

John

Gen 1 · 1 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)

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