This paper proposes high-density and high-fiber-count optical fiber cable, containing fiber ribbons inserted into slots and with a total number of fibers exceeding the current maximum of 1000. Cable structure and cable diameter, which are important factors for economical and efficient construction, are investigated theoretically and experimentally and the optimum structure for achieving small cable diameter is obtained. Based on the results, a 2000-fiber cable was manufactured and its performance was evaluated. The transmission, mechanical and midspan access characteristics of the cable was confirmed to be excellent.