Mary Hennessey — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Denver-County, Colorado

Our Model Tree links this Mary Hennessey across the 1920, 1930 and 1940 US Censuses in Denver-County, Colorado (XGBoost, ~Confirmed) — first a head (b.~1873), then head of a 2-person household.

Age 67 b. ~1873 Female Head Born: Nebraska Widowed

1940 Census Record Details

Census Year	1940
Location	Denver-County, Colorado
Surname	Hennessey
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	67
Marital Status	Widowed
Birthplace	Nebraska
1935 Residence (City)	Denver, City & County of
1935 Residence (County)	Denver
Additional Details
Hours Worked	0
Income (1939)	0
Highest Grade	No 5
1935 Residence	Same place
Birth State	Nebraska
Birth Country	United States
Birthplace (normalized)	nebraska
Township / Ward	Denver City County Of
Est. Birth Year	~1873

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.

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

Name	Relation to head	Relative to Mary	Age	Birth yr
Margaret Mcmullin	Daughter	—	47	~1893
Mary Hennessey	Head	—	67	~1873

Census Appearances

1920

Denver, Colorado

Head, age 47

Denver, Colorado · implied b. ~1873 — 2 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Hennessey
Given Name	Mary L.
Relationship to Head	head
Sex	F
Color / Race	White
Age	47
Marital Status	Widowed
Birthplace	Nebraska
Father's Birthplace	United States
Mother's Birthplace	Pennsylvania
Occupation	none
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Home Owned/Rented	R
Birth State	Nebraska
Birth Country	United States
Birthplace (normalized)	nebraska

1930

Denver, Colorado

Head, age 57

Denver, Colorado · implied b. ~1873

● Primary link · ~Confirmed · 1 source

XGBoost

Surname	Hennessy
Given Name	Mary F.
Relationship to Head	Head
Sex	F
Color / Race	White
Age	57
Marital Status	Widowed
Birthplace	Nebraska
Father's Birthplace	Ohio
Mother's Birthplace	Pennsylvania
Occupation	Dramatizer
Industry	Tent Factory
Class of Worker	W
Can Read/Write	Yes
Home Owned/Rented	R
Home Value / Rent	20
Birth State	Nebraska
Birth Country	United States
Birthplace (normalized)	nebraska

1940

Denver-County, Colorado

Head, age 67

Denver-County, Colorado · implied b. ~1873 — 2 household members

Surname	Hennessey
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	67
Marital Status	Widowed
Birthplace	Nebraska
1935 Residence (City)	Denver, City & County of
1935 Residence (County)	Denver
Hours Worked	0
Income (1939)	0
Highest Grade	No 5
1935 Residence	Same place
Birth State	Nebraska
Birth Country	United States
Birthplace (normalized)	nebraska

Model Tree

Linked across censuses

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

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This person

Anchor record

Mary Hennessey

Head · 1940 · age 67 · b. ~1873 · Colorado

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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 — Denver-County, Colorado Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-00486-00013)

Line	Name	Age	Relation	Occupation	Birthplace
1	Billie Jones	31	Head	—	Oklahoma
2	Betty Jones	13	Daughter	—	Oklahoma
3	Dessa Jones	10	Daughter	—	Oklahoma
4	Joanna Jones	8	Daughter	—	Iowa
5	Fred Bone	34	Head	Truck Driver	Idaho
6	Virginia Bone	28	Wife	—	Oklahoma
7	Velma M. Bone	10	Daughter	—	Colorado
8	Wayne Bone	6	Son	—	Colorado
9	Louis Barton	26	Head	Salesman	New Mexico
10	Ruth Barton	20	Wife	—	Colorado
11	Greta Jones	40	Head	Saleslady	Iowa
12	Evan L. D. Jones	19	Son	—	Colorado
13	Nella M. Jones	13	Daughter	—	Colorado
14	Joseph L. Jones	10	Son	—	Colorado
15	Matilda Smith	69	Head	—	Nebraska
16	Warren Smith	38	Son	Teacher	Colorado
17	Uerich Williams	50	Head	Decorator	Illinois
18	Genevieve Williams	40	Wife	Teleprinter	Colorado
19	Mary Hennessey THIS PERSON	67	Head	—	Nebraska
20	Margaret Mcmullin	47	Daughter	Saleslady	Nebraska
21	Willie M. Thomas	65	Head	—	Missouri
22	Fannie Berglund	41	Daughter	—	Alaska
23	Roy Bahringer	58	Head	Laborer	Ohio
24	Zelma Bahringer	52	Wife	—	Missouri
25	Barbara Bahringer	16	Daughter	—	Colorado
26	Lemuel Evans	44	Head	Plumber	Colorado
27	Grace Evans	42	Wife	—	Colorado
28	Eileen Evans	16	Daughter	—	Colorado
29	Lemuel Jr. Evans	11	Son	—	Colorado
30	Alonzo Parker	77	Head	—	New York
31	Gertie Parker	56	Wife	—	Kansas
32	Leroy Myers	28	Head	Repair Man	Colorado
33	Eda Myers	24	Wife	Supply Lady	Colorado
34	James Wailes	45	Head	Truck Driver	Colorado
35	Bessie Wailes	41	Wife	—	Colorado
36	Jack Wailes	16	Son	—	Colorado
37	Ronald Wailes	4	Son	—	Colorado
38	Mene Lainson	32	Head	—	Colorado
39	Grace Lainson	30	Wife	—	Kansas
40	Norma Lainson	12	Daughter	—	Kansas

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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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