5A

5A may refer to :


 * AAAAA Tourist Attractions of China (5A), tourist attractions in the highest official rating category in the People's Republic of China
 * Alpine Air Express IATA airline designator
 * Vermont Route 5A
 * New York State Route 5A
 * British Columbia Highway 5A
 * Florida State Road 5A
 * GCR Class 5A, a class of British 0-6-0T steam locomotive
 * 5A (drum stick), the most general purpose stick
 * RTS-5A, a former South Australian television station (now WIN SA)
 * Libya (aircraft registration prefix 5A)
 * 5A, the production code for the 1978 Doctor Who serial The Ribos Operation
 * Zeolite 5A, a calcium-type molecular sieve.