We would like to go to Jamaica in July and are interested in a villa. How do I find out available choices.

Most villas have web sites these days, or at least are represented on villa web sites.

Check out:

www.jamaicaescapes.com

www.sunvillas.com

http://www.jamaicavillas.com/

http://www.villasinjamaica.com/

..should get you started

If you are interested in Negril then I would suggest checking out Moon Dance Villas. Don't know your price range but my sister stayed there with her family not long ago. Loved it! They had a 3500 sq ft villa with a cook, bartender & housekeeping. She said it was on the best part of the beach & the villa was gorgeous.The cook would fix food that they wanted & all sorts of drinks were included.

tenntom<

Try also
www.tryallclub.com
www.fernhillvilla.com
www.randolins.com

or just put
jamaica villas
in the search field on google.com

also try
jamaica villa
in the search block above here on Fodors.

I highly recommend Tryall.