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1919 3,000
1920 30,390
1930 105,433
1940 199,420
1950 352,889
1960 911,500
1970 1,151,400
1980 683,121
1990 844,592
2000 605,192
2001 583,904
Source: National Park Service
Petrified Forest visitors
1919 3,000
1920 30,390
1930 105,433
1940 199,420
1950 352,889
1960 911,500
1970 1,151,400
1980 683,121
1990 844,592
2000 605,192
2001 583,904
Source: National Park Service
