October 5, 2025

The message on the back of this postcard was written 115 years ago today — Oct. 5, 1910. The date on the postmark is unreadable, other than the year 1910, but the sender of the card dated the message in pencil. The card shows Duluth’s Board of Trade building, which still stands at 301-307 W. First St., now an 84-unit apartment building branded as Duluth Board of Trade Lofts. …

The population of Duluth, Bloomington, and Rochester over time (Source: U.S. Census Data)

A recent YouTube video on Duluth restaurants described Duluth as the third-largest city in Minnesota — a statement that has been true at various points in the state’s history. Since Minnesota became the 32nd state in 1858, Minneapolis and St. Paul have consistently been its two largest cities. Third place, however, has been considerably less stable. This Duluth Deep Dive takes a closer look at the cities that have held the #3 spot, using aerial images to show how these cities have developed over time. …

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