This very comprehensive report has some surprising conclusions:
“Cities that provide particularly large amounts of parkland per 1,000 residents include New Orleans, Virginia Beach, Albuquerque, Scottsdale, and Jacksonville. Older, more densely populated cities that provide residents with substantial amounts of green space include St. Paul, Minneapolis, Washington, D.C., and Pittsburgh. Anchorage, Alaska offers the most parkland, with the gargantuan Chugach State Park inside its municipal borders.
Among cities that provide considerable parkland as a percent of the city’s area are New York, San Francisco, Boston, San Diego, Raleigh, and Austin.”
The link to the report in the article is broken; it’s actually here.
According to that report, other than Anchorage, the top five cities by park acreage per 1000 residents were New Orleans, Virginia Beach, Scottsdale, Jacksonville and El Paso. The top ten cities in acreage as a percentage of city area were Anchorage, New Orleans, Virginia Beach, Albuquerque, San Diego, New York, Washington DC, San Francisco, El Paso and Raleigh.