I just found a terrific site:
The City Chicken – Chicken Laws
They might be listing your municipality right now. For example, in Washington, DC proper – no chickens. Fairfax County – yepper. They also collect information from commenters, so if your municipality is not listed and you call on your city clerk and get the low-down on chicken ownership, please pass it along to make the site even more complete. Great stuff!!
Kitchen Counter Economics is a community where we can share ideas on how to save money, live more sustainably, and gain control over the stuff of daily living for ourselves and our families in the current economic environment. This started as a series of diary postings at the 

Thanks for mentioning my site!
-Katy
Katy — I’m a big believer in urban chickens – I grew up next to an elderly guy who had rabbit hutches in his back yard from probably the 30s and 1940s – and I’m sure he was not breeding them for show.
Too bad DC won’t let anyone raise a few chickens there – I think it would be a wonderful addition to the White House organic garden.