RM
Ralph Martin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Linn-County, Iowa
Our Model Tree links this Ralph Martin across the 1920, 1930 and 1940 US Censuses in Linn-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1900), then head of a 3-person household.
Age 40
b. ~1900
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Linn-County, Iowa |
| Surname | Martin |
| Given Name | Ralph F. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Cedar Rapids |
| 1935 Residence (County) | Linn |
| Additional Details | |
| Occupation | Electric service man |
| Industry | Ice Cream Co |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 1770 |
| Highest Grade | C 2 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Electric Service Man |
| Township / Ward | Cedar Rapids |
| Est. Birth Year | ~1900 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ralph | Age | Birth yr |
|---|---|---|---|---|
| Elson Martin | Spouse | — | 39 | ~1901 |
| Virginia Martin | Daughter | — | 16 | ~1924 |
| Ralph Martin | Head | — | 40 | ~1900 |
Census Appearances
1920
Linn, Iowa
Head, age 20
Linn, Iowa · implied b. ~1900 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Ralph F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Coal dealer |
| Industry | Cereal Mill |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Linn, Iowa
Head, age 29
Linn, Iowa · implied b. ~1901 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Ralph F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 21 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Trucker |
| Industry | Ice plant |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 45 |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Linn-County, Iowa
Head, age 40
Linn-County, Iowa · implied b. ~1900 — 3 household members
| Surname | Martin |
| Given Name | Ralph F. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Cedar Rapids |
| 1935 Residence (County) | Linn |
| Occupation | Electric service man |
| Industry | Ice Cream Co |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 1770 |
| Highest Grade | C 2 |
| 1935 Residence | Same place |
| 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 Ralph Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Ralph Martin
Head · 1940 · age 40 · b. ~1900 · Iowa
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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 — Linn-County, Iowa
Open full size
1940 US Federal Census — Linn-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01175-01141)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Arthurine Miller | 37 | wife | Private Duty | Iowa |
| 42 | Nancy Miller | 7 | daughter | — | Iowa |
| 43 | Minnie Hemphill | 56 | housekeeper | Housekeeper | Iowa |
| 44 | Geo. P. Starr | 58 | head | Bookkeeper | Iowa |
| 45 | Doris L. Starr | 58 | wife | — | Iowa |
| 46 | Ralph F. Martin THIS PERSON | 40 | head | Electric Service Man | Iowa |
| 47 | Elson Martin | 39 | wife | — | Iowa |
| 48 | Virginia Martin | 16 | daughter | — | Iowa |
| 49 | Joan L. Domer | 21 | head | Sales Person Assistant | Iowa |
| 50 | Arthur H. Mott | 66 | head | City Assessor | Iowa |
| 51 | Isabelle E. Mott | 62 | wife | — | Iowa |
| 52 | Kate M. Perry | 75 | head | — | Iowa |
| 53 | Harriet E. Moffit | 69 | head | — | Iowa |
| 54 | H. Bernice Moffit | 48 | daughter | Teacher | Iowa |
| 55 | Edith Meyer | 50 | head | Office Work | Iowa |
| 56 | Eva Hirschel | 42 | partner | Dept. Manager | Iowa |
| 57 | Sara Thompson | 56 | partner | Cashier | Missouri |
| 58 | Ethel Pierce | 47 | partner | Dept. Manager | Iowa |
| 59 | Irene Mcclellan | 41 | head | Housekeeper | Iowa |
| 60 | Wm. J. Rogers | 35 | head | Operator | Iowa |
| 61 | Leta V. Rogers | 34 | wife | Auditor | Iowa |
| 62 | Mark R. Lilly | 39 | head | Underwriter | Iowa |
| 63 | Evelyn Lilly | 26 | wife | — | Illinois |
| 64 | Veronica Lilly | 0 | daughter | — | Iowa |
| 65 | Roy S. Hardender | 49 | head | Owner | New York |
| 66 | Maude Hardender | 50 | wife | — | Iowa |
| 67 | Geo. B. Foster | 48 | head | Office Manager | Pennsylvania |
| 68 | Katharine Ewing | 64 | head | — | Iowa |
| 69 | Hal R. Sheridan | 47 | head | City Manager | New York |
| 70 | Grace Sheridan | 44 | wife | — | New York |
| 71 | Constance Sheridan | 17 | daughter | — | New Jersey |
| 72 | Henry E. Haegg | 49 | head | Owner | Illinois |
| 73 | Bertha Haegg | 47 | wife | — | Iowa |
| 74 | Henry Jr. Haegg | 16 | son | — | Iowa |
| 75 | Norma L. Haegg | 12 | daughter | — | Iowa |
| 76 | Hilda Carlson | 23 | lodger | Representative | Illinois |
| 77 | Ivy M. Anderson | 33 | lodger | Teacher | Iowa |
| 78 | Lillian Anderson | 38 | lodger | Teacher | Iowa |
| 79 | Ruby Chrisman | 27 | maid | Maid | Iowa |
| 80 | Wilfarene Rogers | 70 | head | — | Iowa |
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)