Welcome To Greenville, Illinois, a small community with big ideas. Whether you're a weekend traveler looking for unique shopping and dining or if you're in the market for a new home, Greenville has something to offer everyone.  Greenville, the county seat of Bond County, has a population of around 6,000, but don't let our size fool you.  In Greenville you can still enjoy a safe and peaceful walk in one of our many neighborhoods, study for a degree at Greenville College, shop in an antique mall, or take in the excitement of the Bond County Fair.