Kelley Williamson Co.

The Kelley Williamson Co., founded in 1926, and its Kelley’s Market convenience stores are targeted to a family-friendly market, according to the company. The stores, in northern Illinois and southern Wisconsin, are known for cleanliness, fast and friendly service, well-lighted facilities and state-of-the-art equipment. Brewed fresh every 30 minutes, its Kona Coffee uses a reverse-osmosis water purification system. The company uses Speedpass, a mobile program that allows consumers to pay for fuel with their phones. Kelley's Market regularly appears in GasBuddy’s list of best-rated c-stores in Illinois.

For benchmarking purposes, store counts are as of Jan. 1, 2022.