Grafton Harbor is located in the center of historic Grafton with boater-friendly amenities galore. It is every boater's delight to see the selection of restaurants, wineries, and exciting activities that Grafton has to offer all within walking distance! Located on Mile Marker 0 of the Illinois River and the confluence of the Mississippi and Illinois Rivers, Grafton Harbors quest is to make your boating experience the finest! Offering 128 covered slips and 52 uncovered slips Grafton Harbor can accommodate boats of all sizes. Our Personal Water Craft Ports give your jet skis fast accessibility to the water. Their in-line rollers make launching easy and convenient. Grafton Harbor offers a host of resort amenities to suit your individual needs, including a swimming pool, restaurant and convenience store. Whether you stay with us for a day or a year, there are multitudes of activities and conveniences at Grafton Harbor or close by, to make your stay comfortable.