As was mentioned by Patrick Schwisow the Lake County, Illinois/Kenosha County, Wisconsin area has a new PHP user group - the Lake / Kenosha County PHP Users Group.

This group allows PHP developers at all levels of expertise get together to discuss various topics in PHP and related web technologies. Events will generally be held in Lake County, Illinois, or Kenosha County, Wisconsin.

As of the time of this post, there aren't any meetups scheduled, but there's already been signups to join the group in its future events. If you're in the area and would like to get involved, go sign up on their Meetup page to keep up to date!