John Frederick — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Palo-Alto-County, Iowa

Our Model Tree links this John Frederick across the 1920, 1930 and 1940 US Censuses in Palo-Alto-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1874), then head of a 4-person household.

Age 66 b. ~1874 Male Head Born: Illinois Widowed

1940 Census Record Details

Census Year	1940
Location	Palo-Alto-County, Iowa
Surname	Frederick
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	66
Marital Status	Widowed
Birthplace	Illinois
1935 Residence (City)	Freedom Twp.
1935 Residence (County)	Palo Alto
Additional Details
Income (1939)	0
Highest Grade	No 8
1935 Residence	Same place
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois
Township / Ward	Freedom Twp
Est. Birth Year	~1874

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
Opal Frederick	Other	—	24	~1916
Lyle Frederick	Son	—	30	~1910
Donna Frederick	Daughter	—	1	~1939
John Frederick	Head	—	66	~1874

Census Appearances

1920

Palo Alto, …

Head, age 46

Palo Alto, Iowa · implied b. ~1874

● Primary link · ~Confirmed · 1 source

XGBoost

Surname	Frederick
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	46
Marital Status	Married
Birthplace	Illinois
Father's Birthplace	Pennsylvania
Mother's Birthplace	Pennsylvania
Occupation	Farmer
Industry	General Farm
Class of Worker	Emp
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Home Owned/Rented	O
Home Free/Mortgaged	F
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

1930

Palo Alto, …

Head, age 56

Palo Alto, Iowa · implied b. ~1874 — 8 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Frederick
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	56
Marital Status	Widowed
Birthplace	Illinois
Father's Birthplace	Pennsylvania
Mother's Birthplace	Pennsylvania
Occupation	Farmer
Industry	General Farm
Class of Worker	VVVV O
Can Read/Write	Yes
Home Owned/Rented	O
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

1940

Palo-Alto-County, Iowa

Head, age 66

Palo-Alto-County, Iowa · implied b. ~1874 — 4 household members

Surname	Frederick
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	66
Marital Status	Widowed
Birthplace	Illinois
1935 Residence (City)	Freedom Twp.
1935 Residence (County)	Palo Alto
Income (1939)	0
Highest Grade	No 8
1935 Residence	Same place
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

Model Tree

Linked across censuses

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

Show:

This person

Anchor record

John Frederick

Head · 1940 · age 66 · b. ~1874 · Iowa

★ 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 — Palo-Alto-County, Iowa Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01189-00199)

Line	Name	Age	Relation	Occupation	Birthplace
1	James Fox	52	Head	Farmer	Iowa
2	Morris Lingenfelter	49	Head	Farmer	Iowa
3	Susanna Lingenfelter	47	Wife	—	Iowa
4	Ellen King Lingenfelter	25	Daughter	School Teacher	Minnesota
5	Marilyn Lingenfelter	3	Niece	—	Iowa
6	Wm Martini	63	Head	Farmer	Iowa
7	Nellie Martini	54	Wife	—	Iowa
8	William Martini	24	Son	Farm Labor	Iowa
9	Lloyd Martini	22	Son	Farm Labor	Iowa
10	Luella Martini	20	Daughter	School Teacher	Iowa
11	Vivian Martini	19	Daughter	—	Iowa
12	Alice Martini	17	Daughter	—	Iowa
13	Lloyd Martini	16	Son	—	Iowa
14	Richard Martini	14	Son	—	Iowa
15	Bertha Martini	12	Daughter	—	Iowa
16	Eldon Martini	10	Son	—	Iowa
17	E. J. Mcewan	67	Head	Farmer	Illinois
18	Olaf Heibland	44	Head	Farmer	Norway
19	Margaret Heibland	37	Wife	—	Minnesota
20	Marion Heibland	19	Daughter	—	Minnesota
21	Orville Heibland	8	Son	—	Iowa
22	Lydia Heibland	4	Daughter	—	Iowa
23	Cornelious Rumble	68	Father-in-law	Farm Labor	Norway
24	William Voigt	58	Head	Farmer	Iowa
25	Marie Voigt	53	Wife	—	Texas
26	Mercedes Voigt	21	Daughter	School Teacher	Iowa
27	Eugene Voigt	18	Son	Farm Laborer	Iowa
28	Pauline Voigt	16	Daughter	—	Iowa
29	William Voigt	13	Son	—	Iowa
30	James Voigt	8	Son	—	Iowa
31	Dora Voigt	6	Daughter	—	Iowa
32	John Frederick THIS PERSON	66	Head	—	Illinois
33	Lyle Frederick	30	Son	Farmer	Iowa
34	Opal Frederick	24	Daughter-in-law	—	Illinois
35	Donna Lou Frederick	1	Daughter	—	Iowa
36	George Harrison	44	Head	Farmer	Iowa
37	Myrtle Harrison	40	Wife	—	Iowa
38	Eldon Harrison	15	Son	—	Iowa
39	Richard Harrison	13	Son	—	Iowa
40	Lois Harrison	12	Daughter	—	Iowa

Search for John Frederick

All John Frederick Census Records Discover Frederick Family Tree

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)

Report inaccurate data