383 Primary Airports (account for 99% passengers)
–31 Large -68% (1% of total enplanements)
–37 Medium –20% (.25% of total enplanements)
–68 Small –8% (.05% of total enplanements)
–247 Non hub –3% (minimum 10,000 passengers)
•2,961 Non-Primary Airports(account for 71% based aircraft)
–127 Non-Primary
Commercial Service
–278 Reliever
–2,556 General Aviation

 

from : https://www.faa.gov/about/office_org/headquarters_offices/aep/aatf/media/Airports%20Data%20Package.pdf

 

Jeff