Yosemite National Park is about 2 times smaller than Everglades National Park.

Everglades National Park is approximately 6,105 km² (2,357 sq mi), while Yosemite National Park is approximately 3,027 km² (1,169 sq mi), making Yosemite National Park 49.59% the size of Everglades National Park.
Tip: This to-scale comparison of Everglades National Park vs. Yosemite National Park uses the Mercator projection, which distorts the size of regions near the poles.

Compare further: Yosemite National Park vs. Everglades National Park

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