After Plankinton’s death, the Merchants’ Association of Milwaukee predicted his legacy would last for generations when they proclaimed, upon his death, “Upon every side stand the substantial monuments of his public spirit, which shall endure when other generations shall walk these streets and other merchants crowd these halls.” John Plankinton’s name endures in his statue, his building, a Milwaukee street, and a small South Dakota town named after him; the Plankinton statue, the Plankinton Arcade, Plankinton Avenue, and Plankinton, South Dakota. His legacy endures in the fabric of the city he helped lead to growth and prosperity in the late 19th century. It is the man, John Plankinton, who is fading from memory in the street and halls of the “city, which owes so much of its prosperity to his name.” 
 Howard Conrad, History of Milwaukee Co: Settlement to 1895: Vol. II ( Chicago: American Biographical Pub. Co.,1895) 302.
 Biographical Dictionary and Portrait Gallery of Representative Men of Chicago, Milwaukee and the World’s Columbian Exposition (Chicago: American Biographical Pub.,1892) 808.