Can you provide a little more information pertaining to the individual you are seeking.
Dear Ms. Suttle,
Thank you for posting your request on History Hub!
This is no single list or registry of all persons that fought in the War of 1812. There are several record series in the custody of the National Archives that document various categories of service during the war.
The record series Enlistment Papers, 1798 - October 31, 1912 and Registers of Enlistments in the United States Army, 1798 - 1914 in the Records of the Adjutant General's Office, 1762 - 1917 (Record Group 94) documents enlisted personnel in the Regular Army. Information relating to officers of the Regular Army can often be found in Letters Received, 1805 - 1889 in Record Group 94.
Carded Records Showing Military Service of Soldiers Who Fought in Volunteer Organizations During the War of 1812 in Record Group 94 documents officers and enlisted soldiers who served in state and US volunteer units. This series is indexed by Indexes to the Carded Records of Soldiers Who Served in Volunteer Organizations During the War of 1812. Portions of both the Carded Records and the indexes to the carded records are digitized and can be accessed online using the Catalog. If he served in a state militia or volunteer unit, there may also be relevant records in the relevant state archives.
Abstracts of Service Records of Naval Officers, 5/1798 - 7/1924 in the Records of the Bureau of Naval Personnel (Record Group 24) document US Navy and US Marine Corps officers. Information about Navy and Marine offices from this time period has also been published in List of officers of the Navy of the United States and of the Marine Corps, from 1775 to 1900.
There are no such compiled summaries to show service for naval enlisted men for this period. If the ship on which a seaman served is known, the Muster Rolls and Payrolls for U.S. Navy Vessels, 1798 - 1860 in the Naval Records Collection of the Office of Naval Records and Library (Record Group 45) can be examined to determine the dates of enlistment and service. If the ship is not known, then the research becomes laborious because the muster and payrolls of all ships operating at that time must be searched, and the names on the rolls are not necessarily arranged alphabetically.
Service in the US Marine Corps is documented in Alphabetical List of Enlisted Men, 1798-1941; Service Records of Enlisted Men, 1798-1900; and Alphabetical Card List of Marine Corps Officers and Marine Corps Reserve Officers, 1798-1941 in the Records of the U.S. Marine Corps (Record Group 127).
The National Archives also has War of 1812 Pension and Bounty Land Warrant Application Files and Case Files of Pension Applications Based on Death or Disability Incurred in Service between 1783 and 1861 ("Old Wars"), ca. 1815 - ca. 1930 in the Records of the Department of Veterans Affairs (Record Group 15).
For more information about these records listed above and other records that may assist in documenting service during the War of 1812, please email the National Archives at Washington, DC - Textual Reference (RDT1) via email at Archives1reference@nara.gov.
An additional series that may include information about individual veterans is Petitions and Memorials, 1822 - 1946 in the Records of the U.S. House of Representatives (Record Group 233). For more information about these records, contact the Center for Legislative Archives (LL) via email at firstname.lastname@example.org.
You also may be interested in the Prologue article Genealogical Records of the War of 1812
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from RDT1 and LL. We apologize for this inconvenience and appreciate your understanding and patience.
Some records relating to individual service in the War of 1812 are available on Fold3 and/or Ancestry. In response to the COVID-19 pandemic, the National Archives has partnered with Ancestry to make the vast majority of their NARA-digitized holdings freely available to the public. Anyone with Internet access may create an account, access NARA records, and use other Ancestry resources, such as their educational offerings and family tree-maker application. This release does not include access to Fold3. For more information see Ancestry’s announcement -- “Free At-Home Education Resources From Ancestry® and Access to Nearly 500M National Archives Records”.
We hope this is helpful. Best of luck with your family research!