Boca Chita Key is the island north of the upper Florida Keys in Biscayne National Park, Miami-Dade County, Florida.
The key is located in Biscayne Bay, just north of Sands Key. An ornamental 65-foot lighthouse is present on the key. The harbor has a bulkhead with cleats where boats may be tied. There is a campground with picnic tables and salt water toilets. Fresh water and electricity are not available on the island.
On the north-west part of the island is the Boca Chita Key Historic District containing historic structures such as the Boca Chita lighthouse.
This key is sometimes confused with the similar-sounding Boca Chica Key over a hundred miles southwest on the lower Florida Keys.