Alexander Lewis (October 4, 1822 – April 18, 1908) was a wholesale goods, insurance, and real estate businessman and mayor of Detroit, Michigan.

Lewis returned to Detroit in 1843 to start a forwarding and commission service with his brother Samuel and Horace Gray.

[1] He was also a member of the Detroit Library Board of Commissioners from 1881 to 1888,[2] and, with Thomas W. Palmer, established the Michigan Society for the Prevention of Cruelty to Animals.

[1] Through his daughter Julia, Alexander is the great-great-grandfather of Baroness Sybille de Selys Longchamps, the mother of Princess Delphine of Belgium (Delphine Michèle Anne Marie Ghislaine de Saxe-Cobourg; born 22 February 1968),[4][5] known previously as Jonkvrouw Delphine Boël, is a Belgian artist and member of the Belgian royal family.

[6] Around 1900, Lewis built a home in Grosse Pointe Farms, Michigan, which is now the parish house for the Saint Paul Catholic Church.