Mary Thompson — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Monroe-County, Florida

Our Model Tree links this Mary Thompson across the 1920, 1930 and 1940 US Censuses in Monroe-County, Florida (XGBoost, ~Confirmed) — first a head (b.~1870), then head of a 4-person household.

Age 70 b. ~1870 Female Head Born: Florida Widowed

1940 Census Record Details

Census Year	1940
Location	Monroe-County, Florida
Surname	Thompson
Given Name	Mary E
Relationship to Head	head
Sex	F
Color / Race	White
Age	70
Marital Status	Widowed
Birthplace	Florida
1935 Residence (City)	Key West city
1935 Residence (County)	Monroe
Additional Details
Industry	0
Highest Grade	No 8
1935 Residence	Same house
Birth State	Florida
Birth Country	United States
Birthplace (normalized)	florida
Township / Ward	Key West City
Est. Birth Year	~1870

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 Mary	Age	Birth yr
Mary Thompson	Daughter	—	13	~1927
Mary Thompson	Head	—	70	~1870
Flora Thompson	Other	—	40	~1900
Wilber Thompson	Son	—	42	~1898

Census Appearances

1920

Monroe, Florida

Head, age 48

Monroe, Florida · implied b. ~1872 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Thompson
Given Name	Mary E.
Relationship to Head	Head
Sex	F
Color / Race	White
Age	48
Marital Status	Widowed
Birthplace	Florida
Father's Birthplace	United States
Mother's Birthplace	Florida
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Home Owned/Rented	O
Home Free/Mortgaged	F
Birth State	Florida
Birth Country	United States
Birthplace (normalized)	florida

1930

Monroe, Florida

Head, age 60

Monroe, Florida · implied b. ~1870 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Thompson
Given Name	Mary E
Relationship to Head	head
Sex	F
Color / Race	White
Age	60
Marital Status	Widowed
Birthplace	Florida
Father's Birthplace	United States
Mother's Birthplace	Kentucky
Occupation	none
Can Read/Write	Yes
Birth State	Florida
Birth Country	United States
Birthplace (normalized)	florida

1940

Monroe-County, Florida

Head, age 70

Monroe-County, Florida · implied b. ~1870 — 4 household members

Surname	Thompson
Given Name	Mary E
Relationship to Head	head
Sex	F
Color / Race	White
Age	70
Marital Status	Widowed
Birthplace	Florida
1935 Residence (City)	Key West city
1935 Residence (County)	Monroe
Industry	0
Highest Grade	No 8
1935 Residence	Same house
Birth State	Florida
Birth Country	United States
Birthplace (normalized)	florida

Model Tree

Linked across censuses

Our Model Tree links Mary Thompson 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 Thompson

Head · 1940 · age 70 · b. ~1870 · Florida

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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 — Monroe-County, Florida Open full size

Page Contents

39 people indexed on this census page (nara:1940:m-t0627-00601-00311)

Line	Name	Age	Relation	Occupation	Birthplace
1	Anita E Ponce	15	daughter	—	Florida
2	Charlotte E Kemper	72	mother-in-law	—	Florida
3	Laura G Archer	61	head	—	Florida
4	John J Archer	28	son	Salesman	Florida
5	Helen C Archer	24	wife	Stenographer	Florida
6	Wilson E Russell	56	brother	Watchman	Florida
7	Arthur S Thompson	39	head	Fisherman	Florida
8	Otilia L Thompson	32	wife	—	Florida
9	Reace A Thompson	17	son	New Worker	Florida
10	Arthur G Thompson	15	son	—	Florida
11	Bert R Thompson	8	son	—	Florida
12	George F Thompson	6	son	—	Florida
13	Metilda L Thompson	2	daughter	—	Florida
15	Mcgregor Sands	72	head	Carpenter	Bahama Islands
16	Adrianna Sands	64	wife	—	Bahama Islands
17	Charles A Sands	25	son	Laborer	Florida
18	Clyde Thompson	26	roomer	Fisherman	Florida
19	Marcella Thompson	20	roomer	—	Florida
20	Thomas H Thompson	51	head	Fisherman	Florida
21	Mary A Thompson	53	wife	—	Florida
22	Ruby K Thompson	23	daughter	Recreation	Florida
23	Barbara E Thompson	18	daughter	—	Florida
24	Edmund H Thompson	15	son	—	Florida
25	Martha E Thompson	14	daughter	—	Florida
26	Walter C Thompson	12	son	—	Florida
27	George S Russell	80	head	Fisherman	Bahama Islands
28	Bertha G Russell	74	wife	—	Florida
29	Mary E Thompson THIS PERSON	70	head	—	Florida
30	Wilber Thompson	42	son	Mechanic	Florida
31	Flora Thompson	40	daughter-in-law	—	Florida
32	Mary E Thompson	13	daughter	—	Florida
33	John J Kirchumboum	53	head	Truck Driver	New York
34	Nellie S Kirchumboum	52	wife	—	Florida
35	Nick Pessas	28	head	Chief Cook	Florida
36	Ruth Pessas	27	wife	—	Virginia
37	Olga Pessas	49	mother	—	Turkey
38	Hanoi Hjort	29	head	Checker	Florida
39	Charles M Hjort	4	son	—	Florida
40	Oscar Cruz	43	head	Fireman	Florida

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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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