化石森林国家公园（Petrified Forest National Park），又称石化森林国家公园为美国一座国家公园，位于亚利桑纳州的北部。是世界上最大的硅化木森林，大部份是南洋杉科南洋杉型木属的南洋杉型木（Araucarioxylon arizonicum）。这些树木曾生存于三叠纪晚期。这个国家公园成立于1962年。其前身是成立于1906年的国家纪念区。

化石森林国家公园可以分成两大部分，由一条南北向的信道来连接，而中间刚好被州际公路40号贯穿。公园内的特色除了化石木以外还有成为"彩绘沙漠"的恶地景观和早期印地安人的遗址。北区包括了颜色多变的侏㑩纪早期的秦里层（Chinle Formation），如同彩绘沙漠一般。南区则包括了鲜艳的岩层与几个硅化木的聚集地，有几个印第安人的岩石画也在南区被发现。在国家公园南部的末端有一间玛瑙屋，这是一间由硅化木所构成的美国天然的建筑，曾经在1930年代被重建。 这个公园每年约有60万人次的游客造访。

Petrified Forest National Park is a United States national park in Navajo and Apache counties in northeastern Arizona. Named for its large deposits of petrified wood, the fee area of the park covers about 170 square miles (440 square kilometers), encompassing semi-desert shrub steppe as well as highly eroded and colorful badlands. The park's headquarters is about 26 miles (42 km) east of Holbrook along Interstate 40 (I-40), which parallels the BNSF Railway's Southern Transcon, the Puerco River, and historic U.S. Route 66, all crossing the park roughly east–west. The site, the northern part of which extends into the Painted Desert, was declared a national monument in 1906 and a national park in 1962. About 800,000 people visit the park each year and take part in activities including sightseeing, photography, hiking, and backpacking.