Best Pest Control in Delavan, Illinois. Top 30 Pest Control in Delavan, Illinois, ranked by rating, reviews, votes. Last updated on May 2024 . Orkin Delavan, Illinois Pest Control Detail Address: Delavan, Delavan, Illinois 61734. Phone: (309) 244-7373. Website: orkin.com. Categories of builders in Delavan, Illinois Construction Machinery Equipment Pest Control Air Conditioning Contractors Systems Paving Contractors Air Conditioning Supplies Parts Wholesale