Alva is an unincorporated community and census-designated place (CDP) in Lee County, Florida, United States, situated on the Caloosahatchee River.

It is part of the Cape Coral-Fort Myers, Florida Metropolitan Statistical Area.

[5] It is bordered to the west by Olga, to the south by Lehigh Acres, and to the east by the community of Fort Denaud in Hendry County.

[9] Alva is the home of a small library dating back to 1909 and a chapel that opened in 1901.

The library closed in 1937, but the building continued in use over the years for various purposes such as high school art classes and a community center.

In 1974, the Alva Garden Club turned the building into a museum with the Library Association trustees' permission.