Difference between National Park and Sanctuary

National parks: These are large areas meant for the protection of flora and fauna and are maintained for scientific, educational, and recreational use. They are not usually used for commercial extraction of resources. 

Sanctuaries: These are tracts of land with or without lakes where wild animals/fauna can take refuge without being hunted. 

Difference between National Park and Sanctuary (National Park vs Sanctuary)

National Park	Sanctuary
It is meant for the protection of both flora and fauna.	It is meant for protection of only fauna
Entirely government-owned	Can be government- or privately owned
Cultivation of land is not permitted	Cultivation of land is permitted
Private ownership is not permitted	Private ownership is permitted
Gazing is not allowed	Gazing is allowed
The boundary is well demarcated	The boundary is not well demarcated
Forest products are not harvested	Forest products are harvested.
Cannot be "downgraded" to a sanctuary.	Can be upgraded to a national park.