JF
James Ferguson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Larimer-County, Colorado
Our Model Tree links this James Ferguson across the 1920, 1930 and 1940 US Censuses in Larimer-County, Colorado (XGBoost, ~Confirmed), with identified parents Mabel & Guy — first a son (b.~1918), then head of a 4-person household.
Age 22
b. ~1918
Male
Son
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Larimer-County, Colorado |
| Surname | Ferguson |
| Given Name | James R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Loveland |
| 1935 Residence (County) | Larimer |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Township / Ward | Loveland |
| Est. Birth Year | ~1918 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Guy Ferguson | Head | — | 57 | ~1883 |
| Andrew Ferguson | Son | — | 16 | ~1924 |
| James Ferguson | Son | — | 22 | ~1918 |
| Mable Ferguson | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Larimer, Colorado
Son, age 2
Larimer, Colorado · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Ferguson |
| Given Name | James L. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Colorado |
| Mother's Birthplace | Wisconsin |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Larimer, Colorado
Son, age 12
Larimer, Colorado · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Ferguson |
| Given Name | James Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Colorado |
| Mother's Birthplace | Wisconsin |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Larimer-County, Colorado
Son, age 22
Larimer-County, Colorado · implied b. ~1918 — 4 household members
| Surname | Ferguson |
| Given Name | James R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Loveland |
| 1935 Residence (County) | Larimer |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 James Ferguson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Mabel Ferguson (~0.92 confidence) and father Guy Ferguson (~0.92 confidence) and mother Mable Ferguson (~0.92 confidence) and father James Ferguson (~0.92 confidence) and father Jay Ferguson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mabel Ferguson
b. ~1882
Source mother
● Household
· direct · ~0.92
Father
Guy Ferguson
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Mable Ferguson
b. ~1883
Source mother
● Household
· direct · ~0.92
Father
James Ferguson
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Jay Ferguson
b. ~1884
Source father
● Household
· direct · ~0.92
This person
Anchor record
James Ferguson
Son · 1940 · age 22 · b. ~1918 · Colorado
★ You are viewing this record
Sibling
Andrew Ferguson
Sibling · 1940 · 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
1940 US Federal Census — Larimer-County, Colorado
Open full size
1940 US Federal Census — Larimer-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00467-00206)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Oscar B. Robbins | 64 | Head | — | Indiana |
| 42 | Zella O. Robbins | 64 | Wife | — | Indiana |
| 43 | Melvin M. Kyger | 43 | Head | — | Colorado |
| 44 | Josephine Kyger | 31 | Wife | — | Idaho |
| 45 | William R. Mitchell | 76 | Head | — | Ohio |
| 46 | Retta Mitchell | 68 | Wife | — | Ohio |
| 47 | Hannah M. Cunningham | 86 | Sister-in-law | — | Ohio |
| 48 | Simon White | 44 | Head | Boiler Foreman | Illinois |
| 49 | Helen White | 42 | Wife | — | Colorado |
| 50 | Loren White | 20 | Son | Common Laborer | Colorado |
| 51 | Sid W. Whitacre | 54 | Head | Brakeman | Missouri |
| 52 | Lottie O. Whitacre | 53 | Wife | — | Nebraska |
| 53 | Marcella J. Whitacre | 4 | Granddaughter | — | Colorado |
| 54 | Phillip J. Ballard | 27 | Head | Bookkeeper | Colorado |
| 55 | Una Ballard | 25 | Wife | — | Nebraska |
| 56 | Carolyn Sue Ballard | 1 | Daughter | — | Colorado |
| 57 | Phillip Dale Ballard | 0 | Son | — | Colorado |
| 58 | Jay L. Miller | 34 | Head | Common Laborer | Missouri |
| 59 | Goldie Miller | 29 | Wife | — | Oklahoma |
| 60 | Eugene E. Miller | 5 | Son | — | Colorado |
| 61 | George H. Branson | 28 | Head | Clerk | Missouri |
| 62 | Josephine M. Branson | 22 | Wife | — | Colorado |
| 63 | Carrie Bieber | 64 | Head | — | France |
| 64 | Guy A. Ferguson | 57 | Head | Proprietor | Colorado |
| 65 | Mable E. Ferguson | 57 | Wife | — | Minnesota |
| 66 | James R. Ferguson THIS PERSON | 22 | Son | — | Colorado |
| 67 | Andrew W. Ferguson | 16 | Son | — | Colorado |
| 68 | John H. Beuermann | 79 | Head | — | Pennsylvania |
| 69 | Elizabeth Beuermann | 76 | Wife | — | Russia |
| 70 | Mossie Fish | 36 | Head | Housekeeper | Kansas |
| 71 | William A. Fish | 16 | Son | — | Kansas |
| 72 | Lorraine Fish | 14 | Daughter | — | Kansas |
| 73 | Katherine Metz | 62 | Head | — | Russia |
| 74 | Nels Martin | 73 | Head | — | Sweden |
| 75 | Mamie C. Martin | 62 | Wife | — | Colorado |
| 76 | Charles Lester | 82 | Head | — | Missouri |
| 77 | Minnie Lester | 63 | Wife | — | Illinois |
| 78 | William Hullam | 81 | Head | — | Illinois |
| 79 | Rebecca Hullam | 76 | Wife | — | Illinois |
| 80 | Barbara Lalcman | 45 | Head | — | Russia |
Pedigree Summary
James + 1 sibling
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)