HP
Harold Peterson — 1930 US Census Record
Model Tree available1930 United States Federal Census · Audubon, Iowa
Our Model Tree links this Harold Peterson across the 1920, 1930 and 1940 US Censuses in Audubon, Iowa (XGBoost, ~Confirmed), with identified parents Arne & Chris — first a son (b.~1907), then head of a 7-person household.
Age 23
b. ~1907
Male
Son
Born: Iowa
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Audubon, Iowa |
| Surname | Peterson |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Additional Details | |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Laborer |
| Township / Ward | Oakfield Township |
| Est. Birth Year | ~1907 |
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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Clara Peterson | Daughter | — | 16 | ~1914 |
| Lily Peterson | Daughter | — | 12 | ~1918 |
| Chris Peterson | Head | — | 57 | ~1873 |
| Harold Peterson | Son | — | 23 | ~1907 |
| Esther Peterson | Daughter | — | 20 | ~1910 |
| Mary Peterson | Other | — | 52 | ~1878 |
| Emma Peterson | Daughter | — | 18 | ~1912 |
Census Appearances
1920
Audubon, Iowa
Son, age 12
Audubon, Iowa · implied b. ~1908 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Petersen |
| Given Name | Harold |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Audubon, Iowa
Son, age 23
Audubon, Iowa · implied b. ~1907 — 7 household members
| Surname | Peterson |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Audubon-County, Iowa
Head, age 33
Audubon-County, Iowa · implied b. ~1907 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Petersen |
| Given Name | Harold |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Brayton Town |
| 1935 Residence (County) | Audubon |
| Occupation | painter |
| Industry | public building |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 380 |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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.
Our Model Tree links Harold Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Arne Petersen (~0.92 confidence) and father Chris Peterson (~0.92 confidence) and mother Maren Petersen (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Arne Petersen
b. ~1871
Source father
● Household
· direct · ~0.92
Father
Chris Peterson
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Maren Petersen
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Peterson
Son · 1930 · age 23 · b. ~1907 · Iowa
★ You are viewing this record
Sibling
Lily Peterson
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emma Peterson
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Esther Peterson
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clara Peterson
Sibling · 1930 · age 16
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 — Audubon, Iowa
Open full size
1930 US Federal Census — Audubon, Iowa
Page Contents
50 people indexed on this census page (ia:1930:iowacensus00reel640:0528)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margery D. Brown | 12 | Daughter | — | Iowa |
| 2 | Chris Christensen | 38 | Head | Farmer | Iowa |
| 3 | Anna M. Christensen | 37 | Wife-H | — | Iowa |
| 4 | Arnold Magill | 20 | Lodger | Laborer | Iowa |
| 5 | Alvin H. Mortensen | 25 | Head | Farmer | Iowa |
| 6 | Elsie I. Mortensen | 26 | Wife-H | — | Iowa |
| 7 | Chris Nielsen | 45 | Head | Farmer | Denmark |
| 8 | Marie Nielsen | 43 | Wife-H | — | Denmark |
| 9 | Alfreda Nielsen | 18 | Daughter | — | Denmark |
| 10 | Raymond Nielsen | 13 | Son | — | Iowa |
| 11 | Arnold Nielsen | 10 | Son | — | Iowa |
| 12 | Robert W. Bagley | 23 | Head | Farmer | Iowa |
| 13 | Florence T. Bagley | 21 | Wife-H | — | Iowa |
| 14 | John A. Bagley | 55 | Father | Farmer | Iowa |
| 15 | Roscoe Smith | 36 | Head | Farmer | Iowa |
| 16 | George W. Madsen | 25 | Head | Farmer | Iowa |
| 17 | Regenia M. Madsen | 21 | Wife-H | — | Iowa |
| 18 | Glen D. Madsen | 1 | Son | — | Iowa |
| 19 | Elmer Nissen | 23 | Brother in law | Laborer | Iowa |
| 20 | Chris Peterson | 57 | Head | Farmer | Denmark |
| 21 | Mary D. Peterson | 52 | Wife-H | — | Denmark |
| 22 | Harold Peterson THIS PERSON | 23 | Son | Laborer | Iowa |
| 23 | Emma Peterson | 18 | Daughter | — | Iowa |
| 24 | Lily Peterson | 12 | Daughter | — | Iowa |
| 25 | Clara Peterson | 16 | Daughter | Servant | Iowa |
| 26 | Esther Peterson | 20 | Daughter | Servant | Iowa |
| 27 | Peter J. Leander | 58 | Head | Farmer | Denmark |
| 28 | Mary F. Leander | 54 | Wife-H | — | Iowa |
| 29 | Henry H. Leander | 27 | Son | Laborer | Iowa |
| 30 | Peter Beck | 66 | Head | Farmer | Denmark |
| 31 | Katrina Beck | 64 | Wife-H | — | Denmark |
| 32 | Peter C. Beck | 41 | Son | — | Denmark |
| 33 | Clarence H. Smith | 23 | Head | Farmer | Iowa |
| 34 | Isaac Smith | 74 | Father | — | Illinois |
| 35 | Grace Smith | 58 | Mother | — | Iowa |
| 36 | Agusta A. Smith | 35 | Sister-H | — | Iowa |
| 37 | Matthew B. Smith | 19 | Brother | — | Iowa |
| 38 | John E. Kelley | 61 | Head | Farmer | Iowa |
| 39 | Frances M. Kelley | 49 | Wife-H | — | Iowa |
| 40 | Janice E. Kelley | 22 | Daughter | — | Iowa |
| 41 | John C. Kelley | 20 | Son | — | Iowa |
| 42 | Naomi Kelley | 18 | Daughter | — | Iowa |
| 43 | Verna Kelley | 9 | Daughter | — | Iowa |
| 44 | Harold L. Nelson | 34 | Head | Farmer | Iowa |
| 45 | Marie M. Nelson | 32 | Wife-H | — | Iowa |
| 46 | Bernice E. Nelson | 6 | Daughter | — | Iowa |
| 47 | Aris H. Nelson | 3 | Daughter | — | Iowa |
| 48 | Peter J. Schmidt | 36 | Head | Farmer | Iowa |
| 49 | Laura A. Schmidt | 34 | Wife-H | — | Iowa |
| 50 | Floyd A. Schmidt | 13 | Son | — | Iowa |
Pedigree Summary
Harold + 4 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)