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Mary Irwin — 1930 US Census Record

Linked across censuses

1930 United States Federal Census · Baltimore, Maryland

Our Model Tree links this Mary Irwin across the 1930 and 1940 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 6-person household.

Age 5 b. ~1925 Female Daughter Born: Maryland Single

1930 Census Record Details

Census Year1930
LocationBaltimore, Maryland
SurnameIrwin
Given NameMary
Relationship to HeadDaughter
SexF
Color / RaceWhite
Age5
Marital StatusSingle
BirthplaceMaryland
Father's BirthplaceMaryland
Mother's BirthplaceMaryland
Additional Details
Can Read/WriteYes
Birth StateMaryland
Birth CountryUnited States
Birthplace (normalized)maryland
Township / WardBaltimore
Est. Birth Year~1925

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.

6 people recorded at the same address in the 1930 census.

Name Relation to head Relative to Mary Age Birth yr
Margaret Irwin Spouse — 36 ~1894
Clarence Irwin Son — 11 ~1919
Clarence Irwin Head — 35 ~1895
Lewis Irwin Son — 10 ~1920
Mary Irwin Daughter — 5 ~1925
Audrey Irwin Daughter — 4 ~1926

Census Appearances

1930
Baltimore, Maryland
Daughter, age 5
Baltimore, Maryland · implied b. ~1925 — 6 household members
Surname Irwin
Given Name Mary
Relationship to Head Daughter
Sex F
Color / Race White
Age 5
Marital Status Single
Birthplace Maryland
Father's Birthplace Maryland
Mother's Birthplace Maryland
Can Read/Write Yes
Birth State Maryland
Birth Country United States
Birthplace (normalized) maryland
1940
Baltimore-City-County, Maryland
Other, age 15
Baltimore-City-County, Maryland · implied b. ~1925 — 6 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Irwin
Given Name Margaret B.
Relationship to Head Sister
Sex F
Color / Race White
Age 15
Marital Status Single
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

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.
Linked across censuses
Our Model Tree links Mary Irwin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Irwin
Daughter · 1930 · age 5 · b. ~1925 · Maryland
★ You are viewing this record
Sibling
Lewis Irwin
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Audrey Irwin
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clarence Irwin
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+) Probable / derived (~0.65–0.89) Candidate (<0.65, unverified)

Original Census Page

1930 US Federal Census — Baltimore, Maryland Open full size

Page Contents

50 people indexed on this census page (ia:1930:15thcensus866unit:0007)

Line Name Age Relation Occupation Birthplace
1 George Adelman 71 Head Butcher Germany
2 Elizabeth Adelman 40 Daughter Packer Germany
3 James Smith 42 Head Laborer New Jersey
4 Lillian Smith 24 Wife — Maryland
5 Dorothy Smith 5 Daughter — Maryland
6 Wm R Soyer 26 Head Mechanic Maryland
7 Lillian Ruth Soyer 29 Wife — Maryland
8 William D Soyer 6 Son — Maryland
9 Lillian Ruth Soyer 4 Daughter — Maryland
10 Helen Mary Soyer 2 Daughter — Maryland
11 John E Soyer 0 Son — Maryland
12 John Christian 64 Father-in-law Pumpman Maryland
13 Elizabeth Trapp 53 Head Clerk New Jersey
14 William Bonschoff 30 Son-in-law Fireman Maryland
15 Annaliese Bonschoff 25 Daughter — Maryland
16 William Trapp 24 Son Laborer Maryland
17 Katherine Trapp 16 Daughter — Maryland
18 Wm Jr Bonschoff 6 Grandson — Maryland
19 Richard W Bonschoff 4 Grandson — Maryland
20 John J Neuschaffer 72 Head Laborer Maryland
21 Annie E Neuschaffer 71 Wife — Maryland
22 Wm R Squires 68 Head Watchman Maryland
23 Mary E Squires 67 Wife — Maryland
24 Wm H Squires 35 Son Printer Maryland
25 Amelia K Squires 32 Daughter-in-law — Maryland
26 Richard W Squires 9 Grandson — Maryland
27 Doris A Squires 6 Granddaughter — Maryland
28 Edward Weiland 44 Head Cabinet Maker Maryland
29 Mamie Weiland 42 Wife — Germany
30 Margaret Weiland 14 Daughter — Maryland
31 Ellen Weiland 9 Daughter — Maryland
32 Wilbur P Belt 45 Head Helper Maryland
33 Emma V Belt 42 Wife — Maryland
34 Wilbur Jr Belt 19 Son Laborer Maryland
35 Francis Belt 17 Son Laborer Maryland
36 Clarence Irwin 35 Head Engineer Maryland
37 Margaret Irwin 36 Wife — Maryland
38 Clarence Jr Irwin 11 Son — Maryland
39 Lewis Irwin 10 Son — Maryland
40 Mary Irwin THIS PERSON 5 Daughter — Maryland
41 Audrey E Irwin 4 Daughter — Maryland
42 Earl Schwablein 32 Head Laborer Maryland
43 Ada Schwablein 24 Wife — Maryland
44 Ruth Schwablein 7 Daughter — Maryland
45 Earl Jr Schwablein 5 Son — Maryland
46 Wilda Schwablein 4 Daughter — Maryland
47 Carry M Schwablein 2 Daughter — Maryland
48 John C Smith 47 Head Carpenter Maryland
49 Lillian Smith 48 Wife Housekeeper Maryland
50 Edward Neupert 30 Head Mechanic Maryland

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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)

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