List of most-listened-to radio programs

In the United States radio listenership is gauged by Nielsen and others for both commercial radio and public radio. Nielsen and similar services provide estimates by regional market and by standard daypart, but does not compile nationwide information by host. Because there are significant gaps in Nielsen's coverage in rural areas, and because there are only a few markets where the company's proprietary data can be compared against competing ratings measurers, there is a great deal of estimation and interpolation when attempting to compile a list of the most-listened-to radio programs in the United States. Nielsen itself admits the task of measuring individual shows would be too complicated and difficult for them to manage. In contrast, because most UK radio broadcasts are distributed consistently and nationwide, the complications of measuring audiences that are present in American radio are not present on British radio.