A while back, the Post-Dispatch compiled a list of all of the Missouri elected officials who tweet. To that list, I’d add Mayor Slay’s office [correct link here] and all of the St. Louis Aldermen who tweet (they refer to themselves as “Aldertweets”), including:
Following your aldermen and other elected officials on Twitter provides a unique perspective on the political scene that you won’t get from traditional media.
I looked, but didn’t see a list for Illinois. If I do find one, I’ll pass it along or if you see one (or know of more officials who should be included on the Missouri list) post it in the comments!
[Updated: Added another AlderTweet and fixed MayorSlay’s reference here.]