HZ
Harry Zimmerman — 1940 US Census Record
Model Tree available1940 United States Federal Census · Frederick-County, Maryland
Our Model Tree links this Harry Zimmerman across the 1920, 1930 and 1940 US Censuses in Frederick-County, Maryland (XGBoost, ~Confirmed), with identified parents Wm & Emma — first a head (b.~1887), then head of a 4-person household.
Age 53
b. ~1887
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Frederick-County, Maryland |
| Surname | Zimmerman |
| Given Name | Harry W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Farmhouse |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Frederick City |
| Est. Birth Year | ~1887 |
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 Harry | Age | Birth yr |
|---|---|---|---|---|
| Lois Zimmerman | Daughter | — | 12 | ~1928 |
| Nellie Zimmerman | Spouse | — | 50 | ~1890 |
| Wallace Zimmerman | Son | — | 16 | ~1924 |
| Harry Zimmerman | Head | — | 53 | ~1887 |
Census Appearances
1920
Frederick, Maryland
Son, age 32
Frederick, Maryland · implied b. ~1888 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Zimmerman |
| Given Name | Harry W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Frederick, Maryland
Head, age 43
Frederick, Maryland · implied b. ~1887 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Zimmerman |
| Given Name | Harry W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 33 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Foreman |
| Industry | Laundry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Radio Set | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Frederick-County, Maryland
Head, age 53
Frederick-County, Maryland · implied b. ~1887 — 4 household members
| Surname | Zimmerman |
| Given Name | Harry W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Farmhouse |
| Highest Grade | No 7 |
| 1935 Residence | Maryland |
| 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.
Our Model Tree links Harry Zimmerman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Wm Zimmerman (~0.92 confidence) and mother Emma Zimmerman (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Wm Zimmerman
b. ~1859
Source father
● Household
· direct · ~0.92
Mother
Emma Zimmerman
b. ~1860
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harry Zimmerman
Head · 1940 · age 53 · b. ~1887 · Maryland
★ 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 — Frederick-County, Maryland
Open full size
1940 US Federal Census — Frederick-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01548-00433)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Pauline Gilderbeant | 29 | Sister | Topper | Maryland |
| 42 | Richard A. Breschey | 52 | Head | Foreman | Maryland |
| 43 | Anna M. Breschey | 53 | Wife | — | Maryland |
| 44 | Kenneth G. Metcalf | 43 | Head | Manager | New York |
| 45 | Calvie M. Metcalf | 41 | Wife | — | New York |
| 46 | Richard M. Metcalf | 12 | Son | — | Maryland |
| 47 | Virginia Metcalf | 10 | Daughter | — | Maryland |
| 48 | Harry W. Zimmerman THIS PERSON | 53 | Head | — | Maryland |
| 49 | Nellie H. Zimmerman | 50 | Wife | — | Maryland |
| 50 | Wallace H. Zimmerman | 16 | Son | — | Maryland |
| 51 | Lois E. Zimmerman | 12 | Daughter | — | Maryland |
| 52 | Charles W. Zimmerman | 81 | Head | — | Maryland |
| 53 | Lillian M. Zimmerman | 49 | Daughter | — | Maryland |
| 54 | Claude W. Zimmerman | 47 | Son | Machinist | Maryland |
| 55 | Rhoda C. Stevens | 49 | Head | — | Maryland |
| 56 | Ruth M. Stevens | 26 | Daughter | Hand Ironer | Maryland |
| 57 | Madeline C. Stevens | 20 | Daughter | Salesgirl | Maryland |
| 58 | Maynard Harper | 28 | Head | Teacher | Maryland |
| 59 | Agnes B. Harper | 28 | Wife | Teacher | Maryland |
| 60 | Jacob T. Lamburg | 32 | Head | Agent | Maryland |
| 61 | Ethel M. Lamburg | 24 | Wife | — | Maryland |
| 62 | Jacob T. Jr. Lamburg | 3 | Son | — | Maryland |
| 63 | Martha A. Lamburg | 2 | Daughter | — | Maryland |
| 64 | J. Guyon Noell | 47 | Head | Driver | Pennsylvania |
| 65 | Edna M. Noell | 44 | Wife | — | Pennsylvania |
| 66 | Amelia C. Wolff | 73 | Mother | — | Pennsylvania |
| 67 | Carter J. Rorapaugh | 65 | Lodger | Traveling Salesman | New York |
| 68 | Mae E. Rorapaugh | 59 | Lodger | — | Delaware |
| 69 | Glenn Zimmerman | 47 | Head | Manager | Maryland |
| 70 | Dorrine Zimmerman | 41 | Wife | — | Maryland |
| 71 | Eleanor Waceness | 58 | Sister-in-law | — | Maryland |
| 72 | Mary M. Zimmerman | 81 | Mother | — | Maryland |
| 73 | William H. Breed | 59 | Lodger | Laborer | Maryland |
| 74 | Clara V. Ridill | 70 | Head | — | Maryland |
| 75 | Lester C. Koogle | 40 | Head | Plumber | Maryland |
| 76 | Courtney E. Koogle | 31 | Wife | — | Maryland |
| 77 | Lester C. Jr. Koogle | 11 | Son | — | Maryland |
| 78 | Richard D. Koogle | 9 | Son | — | Maryland |
| 79 | Martha Koogle | 1 | Daughter | — | Maryland |
| 80 | Charles A. Grove | 43 | Head | Salesman | Maryland |
Pedigree Summary
Harry
Gen 1 · 2 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)