Determining the largest auto lender in the United States typically depends on whether you measure by new vehicle financing, used vehicle financing, or overall loan portfolio volume. Captive finance companies tied directly to major automakers—such as Toyota Financial Services and Ford Motor Credit—consistently command the largest market share for new vehicle sales due to manufacturer-backed promotional rates and lease programs. Meanwhile, in the realm of retail banks and independent digital financing, major institutions like Capital One Auto Finance, Ally Financial, and Chase Auto handle massive volumes of both new and used vehicle transactions. These industry leaders maintain extensive dealer networks and direct-to-consumer digital portals that process millions of vehicle financing applications annually.