This publication provides records of 1,449 United States county land ownership maps in the Geography and Map Division, Library of Congress. These maps contain the entry number, county and date, author or surveyor, publisher and place, and size of the land. The author describes the historical development of the land ownership maps and their importance, as they predate the more publicized county platbook and the topographic surveys of the U.S. Geological Survey. This checklist is arranged alphabetically - chronologically within each state, with a general index to county names, cartographers, surveyors, and publishers.