Here you go Bob, this is the USDA zone map
USDA Zone map
For our zone we have several palms to look at:
Rhapidophyllum hystrix (Needle palm)
Sabal minor (and possibly S.louisiana, S.Birmingham, and S. McCurtain County)
Trachycarpus fortunei (been used as a die-back perennial in our zone, fast grower)
Grated I don't have any yet, but looking at them hard right now.
Here is a link to a guy in zone 5 with a Washingtonia robusta in the ground, but it gets a mini hot house over the winter:
W.robusta
I would love to try this, but want to move to a house with a south facing backyard first.