Size. Land Mass: 759,620 acres (or 1,187 square miles) Park Statistics - Yosemite National Park (U.S. National Park Service) Yosemite National Park had a comprehensive survey conducted for one week in July 2009. In it, 1,326 visitor groups were systematically selected from all five park entrance stations. There was a 65% response rate. The entire survey and results can be viewed at Yosemite National Park Visitor Study: Summer 2009 [1.5 MB PDF].