Monroe County, Florida Zip Codes

Zip Code	City	Population
33040	Key West	36,379
33037	Key Largo	13,265
33050	Marathon	10,520
33042	Summerland Key	6,990
33070	Tavernier	5,717
33043	Big Pine Key	4,547
33036	Islamorada	3,620
33051	Key Colony Beach	650
33001	Long Key	340

Population is the most recent figure from the U.S. Census Bureau's 2022 American Community Survey (ACS) 5-Year Estimates.