Dear Ms. Staines,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located a series titled Records of Appointments of Postmasters, 1832 - 9/30/1971 and Records of Appointment of Postmasters and the Establishment of Post Offices, 7/1/1931 - 10/31/1971 in the Records of the Post Office Department (Record Group 28). These records were micofilmed as the microfilm publication M841 Record of Appointments of Postmasters, 1832-Sept. 30, 1971. M841 has been digitized and images are available online through the Catalog. Although the digitized records are attached to the 7/1/1931 - 10/31/1971 series, they include records for appointments as early as 1832. We also located Records of Appointment of Postmasters, 1814 - 1832 in Record Group 28. These records have been digitized and are available online through the Catalog. Next, we located Records of First Returns Received from Postmasters, ca. 1836 - ca. 1836 in Record Group 28 that includes the volume 10/1789 - 7/1818. This volume has been digitized and is available for online through the Catalog. Additionally, we located Indexes to the Appointment of Postmasters and the Establishment of Post Offices, 1790 - 1948 in Record Group 28. These records have not been digitized and are not available online. For more information about these records, please contact the National Archives at Washington, DC - Textual Reference (RDT1) at email@example.com.
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. We apologize for this inconvenience and appreciate your understanding and patience.
The 1832-1971 records are available in full from Ancestry through their website as data collection U.S., Appointments of U. S. Postmasters, 1832-1971. Some libraries provide free access to Ancestry to their patrons. The copies on Ancestry are name searchable.
Plus, the USPS Historian’s Postmaster Finder lists most postmasters appointed after 1986 and some postmasters appointed before 1986, back to the 1700s. The Postmaster Finder offers several options for searching the information.
Lastly The Official Register of the United States listed all the postmasters for the years in which it was published. Copies of many of the editions are available online through the HathiTrust and some editions are available on GovInfo.gov.