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Lewis County, New York
Genealogy, History & Facts

Lewis County, New York Facts

Lewis County

When was Lewis County, NY Created?
Lewis County was created on March 28, 1805 from Oneida County. This particular county was named in honor of Morgan Lewis (1754–1844), the fourth Governor of New York.

What is the County Seat of Lewis County, NY?
The County Seat is located in Lowville and in addition the county government website is

What counties are adjacent to Lewis County, NY?
Bordering Counties are St. Lawrence County (north), Herkimer County (southeast), Oneida County (south), Oswego County (southwest), Jefferson County (northwest).

What cities and towns are in Lewis County, NY?
Cities and towns located in the County include Castorland (village), Constableville (village), Copenhagen (village), Croghan (town), Croghan (village), Denmark (town), Diana (town), Greig (town), Harrisburg (town), Harrisville (village), Lewis (town), Leyden (town), Lowville (village), Lowville (town), Lyons Falls (village), Lyonsdale (town), Martinsburg (town), Montague (town), New Bremen (town), Osceola (town), Pinckney (town), Port Leyden (village), Turin (town), Turin (village), Watson (town), West Turin (town).

Lewis County, NY Vital Records

Where can find Lewis County Birth, marriage, Divorce and Death Records?
Lewis County vital records can be found at the New York Department of Health which has copies of birth records after 1881 and death records after 1880, copies of marriage since 1881 (A marriage license may also sometimes be found in the office of the town or city clerk who issued the license) and a Divorce records since 1847 (Is handled in the supreme court for the county in which the divorce was heard. Divorce files, however, are sealed for one hundred years). There is a fee for each copy requested. Please refer to the information to the Statewide Vital Records in New York for current fees and application process.

You can search online for Lewis County Birth, Marriage, Divorce or Death Records. You can also Order Electronically Online or can download an application for New York Birth and Death Certificate, Marriage and Divorce Certificate Application to mail.

Lewis County, NY Census Records

What Lewis County, NY census records are available?
There are many types of census records for Lewis County guide you in researching your family tree. Federal Population Schedules are available for 1810, 1820, 1830, 1840, 1850, 1860, 1870, 1880 (free index), 1890 (fragment), 1900, 1910, 1920, 1930, 1940.

Lewis Co. Mortality Schedules can be obtained for 1850, 1860, 1870 and 1880. Lewis Co. Industry and Agriculture is available for 1850, 1860, 1870 and 1880. Lewis Co. Union Veterans Schedules can be obtained for 1890.

There are New York State censuses from 1880, 1892, 1905, 1855, 1865, 1875, 1892, 1905, 1915, 1925. You can get free downloadable and also printable census forms to help you with your research. See Also New York Census Records Research Guide

Lewis County, NY Courthouse and Government Records

Lewis County Courthouse

What genealogical records can I find in the Lewis County Courthouse?
The below facts shows exactly what death, marriage, birth, property, wills, and court records are typically in Lewis County. The years listed below are the first noted records with this county. See Also New York Corthouse Records Research Guide.

  • Lewis County Courthouse (all departments listed below are located here, unless otherwise noted)
    • Address: 7660 N State St, Lowville, NY 13367
    • Also contact local Town Clerks. They are responsible for vast amounts of local information from deeds, property transfers, and genealogical materials. Research on place and road names, the history of property transfers and much more are available through your Town Clerk. They are a tremendous resources.
  • Lewis County Clerk  is the keeper of most civil and criminal trial court records for Supreme Court and County Court, naturalizations, marriages (1908–35), censuses (Some county clerks' offices hold duplicate copies of some of the State censuses taken periodically between 1825 and 1925 and copies of the federal census), as well as deeds and mortgages.
    • Phone: 315-376-5333
    • Land Records: 1805 (Land conveyances, deeds and mortgages are recorded in the county clerks' offices or in the New York City Register's Office. Recording of deeds became mandatory statewide in 1840. Before that many deeds were not recorded)
    • Court Records: 1805
    • Naturalization Records: State court naturalization records remain in custody of the county clerks. Older court naturalization records have been transferred to the National Archives--Northeast Region.
  • Lewis County Surrogate Court Clerk maintain records of wills, letters testamentary, letters of administration, orders and decrees, and appointments of guardians; and filed papers, including original wills, petitions for probate (gives date of death and lists next of kin), performance bonds, property inventories (seldom found after ca. 1900), administrator's or executor's accountings, etc. Surrogate's Courts create comprehensive indexes to records and files.
    • Phone: 315-376-5344
    • Probate Records: 1805 (each county generally has records dating back to the establishment of the county or 1787, whichever was later. Record keeping was systematized by an 1830 statute)
  • Lewis County Treasurer is responsible for the collection of taxes.
  • Lewis County Historian maintains archival holdings for virtually every facet of the county’s history. In New York State, every municipality (town, city, village, county) must have an appointed historian. Most of the towns have their own historians as well and each can be contacted. The County Historian may provide access to obituaries, vital records, church records, maps, and family files or journals. Some historians provide search services for their office records and others may refer you to local genealogists who research in the area.
    • Address: Masonic Temple Building, 7552 South State Street, P.O. Box 446, Lowville, New York 13367
    • Phone: 315-376-2825
  • New York Wills, 1626-1836
  • BLM Land Records

Lewis County, NY Societies and Family History Resources

What genealogical and historical societies, archives, museums, associations and libraries are available for Lewis County, NY?
A list of Lewis County Historical  and Genealogical Societies, Libraries, Archives. See also list of Statewide New York Archives, Historical & Genealogical Societies.

Where can I connect with other Lewis County, NY Researchers through message boards and forums?

What other genealogical resources are available in Lewis County, NY?
The following are web links to Genealogy, Records and Resources pertaining to Lewis County. Most of these genealogy links fall into 3 categories: Business oriented Sites, Private Sites or Organization Sites. Some have free access some have to have a cost. This is simply a listing that has been compiled or submitted. I do not recommend or promote one genealogy site over another.

Lewis Co. NY Books, Newspapers & Publications

Lewis Co. NY Cemeteries & Church Records

Lewis Co. NY Family Websites, Pictures & Histories

Lewis Co. NY General and History Websites

Lewis Co. NY Immigration & Naturalization

Lewis Co. NY Maps, Atlases & Gazetteers

Lewis Co. NY Military Records

Lewis Co. NY Schools & Directories

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