How many Mary Peck census records do you have?

We have 3185 US Census records for Mary Peck, from 1900 to 1950, across 49 states and DC.

What's in a Mary Peck census record?

You'll see Mary's age, birthplace, occupation, and relationship to the head of household — plus everyone else who lived in the same home. For 1940 and 1950 records, you can also view the original handwritten census page.

How do I use census records for family research?

Census records are a snapshot of a family every 10 years. You can follow Mary Peck's household over time — see when children appear, when people move states, and who's living together. YourRoots connects census data with Tree Matching and AI tools so you can build out your tree faster.

Are Mary Peck census records free?

Yes. All Mary Peck census records on YourRoots are free to search and view — no subscription required. We built our own index from the original federal census images.

Which census years and states cover Mary Peck?

We have Mary Peck records from the 1900 through 1950 US Federal Census, across 49 states and DC. Use the year and state filters to narrow your results.

How do I find Mary Peck in the census?

Start by narrowing the year and state. If you know an approximate birth year, use the age column to match — census age minus the census year gives you a birth year estimate. Household members, birthplace, and occupation help confirm you have the right person.

What is the Model Tree for Mary Peck?

The Model Tree is YourRoots' unique feature that links a person across multiple census decades and reconstructs their likely family — parents, siblings, spouse, and children — based on household patterns. It turns isolated records into a connected family network.

Where does the census data come from?

All records originate from the US Federal Census microfilm digitized by NARA (National Archives and Records Administration). YourRoots re-indexed the original page images using modern AI, catching names and details that older transcriptions missed.

Mary Peck — US Census Records & Model Tree

We found 3185 free census records for Mary Peck across 6 census years (1900–1950), in 49 states and DC and 854 counties. Each record includes our Model Tree — the same person linked across decades using machine learning, with per-link confidence scores.

Mary Peck Census Records by State & County

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Showing of 3185 records for Mary Peck US Census, ranked by Model Tree richness

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Year	Name	Age	Location	Birthplace	Occupation	Relation
1940	Mary S. Peck	48	Union-County, New Jersey	Maine	—	Wife
1940	Mary E Peck	67	Dauphin-County, Pennsylvania	Pennsylvania	—	Wife
1930	Mary A Peck		Los Angeles, California	Illinois	None	Head
1930	Mary Peck		Mccurtain, Oklahoma	Oklahoma	None	Daughter
1910	Mary Peck		Greenbrier, West Virginia	West Virginia	—	Daughter
1930	Mary Ann Peck		Worcester, Massachusetts	Massachusetts	—	Daughter
1930	Mary Peck		Maricopa, Arizona	New Mexico	—	Daughter
1910	Mary Peck		Dauphin, Pennsylvania	Pennsylvania	None	Wife
1940	Mary E. Peck	12	Winneshiek-County, Iowa	Iowa	—	Daughter
1910	Mary Peck		Ontario, New York	New York	None	Wife
1940	Mary Peck	10	Lake-County, Indiana	Indiana	—	Daughter
1930	Mary J. Peck		Poweshiek, Iowa	Iowa	—	Daughter
1940	Mary A. Peck	10	Lancaster-County, Nebraska	Nebraska	—	Daughter
1910	Mary L. Peck		Bristol, Massachusetts	Massachusetts	None	Wife
1910	Mary E Peck		Providence, Rhode Island	Rhode Island	—	Wife
1930	Mary E. Peck		Cabell, West Virginia	Kentucky	—	Wife
1910	Mary G. Peck		Routt, Colorado	Colorado	None	Daughter
1900	Mary Peck	65	Orange, New York	Ireland	—	Wife
1940	Mary Peck	52	Cedar-County, Nebraska	Iowa	—	Wife
1940	Mary D. Peck	23	Canyon-County, Idaho	Idaho	Housekeeper	Daughter
1930	Mary Peck		Plymouth, Massachusetts	Portugal	—	Wife
1900	Mary Peck	15	Hennepin, Minnesota	Minnesota	At School	Daughter
1930	Mary E Peck		Fulton, Pennsylvania	Pennsylvania	Teacher	Daughter
1910	Mary E. Peck		Middlesex, Connecticut	Connecticut	—	Wife
1920	Mary Peck		Forsyth, North Carolina	North Carolina	None	Wife
1940	Mary Peck	29	Milwaukee-County, Wisconsin	Wisconsin	—	Wife
1940	Mary E. Peck	48	King-County, Washington	Pennsylvania	—	Wife
1940	Mary C. Peck	19	King-County, Washington	Washington	—	Daughter
1900	Mary B. Peck	42	Providence, Rhode Island	Massachusetts	—	Wife
1910	Mary E. Peck		Cook, Illinois	Vermont	—	Wife

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About Mary Peck US Census Records & Model Tree

We've indexed 3185 free, proprietary US Census records for Mary Peck across 1900–1950, covering 49 states and DC: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, District of Columbia, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming.

Each record includes our Model Tree — a longitudinal reconstruction that links the same person across census decades using machine learning (XGBoost record linkage). Every link carries a confidence score: Verified (≥0.99), Confirmed (≥0.95), or Linked (lower confidence). This tells you not just what the census says, but how reliably we've connected records across time.

Every record also shows the full household — who Mary lived with, their ages, birthplaces, and occupations. For 1940 and 1950 records, you can view the original handwritten census page from the National Archives.

How we build the Model Tree. YourRoots independently indexes US Census records from NARA microfilm and links persons across decades using XGBoost-based record linkage. Each link's confidence is a per-pair match score from the model. Household corroboration (co-residents appearing on the same census pages in multiple years) strengthens the signal. The Model Tree is not a family tree submitted by users — it's reconstructed from the census data itself.

Last updated: July 30, 2026

Frequently Asked Questions

: We have 3185 US Census records for Mary Peck, from 1900 to 1950, across 49 states and DC.
: You'll see Mary's age, birthplace, occupation, and relationship to the head of household — plus everyone else who lived in the same home. For 1940 and 1950 records, you can also view the original handwritten census page.
: Census records are a snapshot of a family every 10 years. You can follow Mary Peck's household over time — see when children appear, when people move states, and who's living together. YourRoots connects census data with Tree Matching and AI tools so you can build out your tree faster.
: Yes. All Mary Peck census records on YourRoots are free to search and view — no subscription required. We built our own index from the original federal census images.
: We have Mary Peck records from the 1900 through 1950 US Federal Census, across 49 states and DC. Use the year and state filters above to narrow your results.
: Start by narrowing the year and state. If you know an approximate birth year, use the age column to match — census age minus the census year gives you a birth year estimate. Household members, birthplace, and occupation help confirm you have the right person.
: The Model Tree is YourRoots' unique feature that links a person across multiple census decades and reconstructs their likely family — parents, siblings, spouse, and children — based on household patterns. It turns isolated records into a connected family network.
: All records originate from the US Federal Census microfilm digitized by NARA (National Archives and Records Administration). YourRoots re-indexed the original page images using modern AI, catching names and details that older transcriptions missed.