Welcome to Monticello! The City of Monticello is a vibrant community, proud of its rich heritage, excited about its recent growth, and eagerly looking forward to the challenges of this new century. Monticello was founded in 1856 by second-generation Americans who migrated west in the mid 1800s and found the shallow banks of the Mississippi a natural place for settlement. The City of Monticello is now a rapidly growing city of more than 10,000 located at the intersections of Highway 25 and Interstate I-94. (763) 286-7573