Portland’s post office opened in 1857, and 5 of its places are on the National Register
Most of Portland was built recently: 8% of its homes predate 1940 and the median home dates from 1970. Below: maps from 1908 on and the census since 1880.
Portland was formed in the 1830s along Bayou Bartholomew by two plantation owners. As Portland grew, most of its residents were store owners who received goods from the port, for which the city was named. In the 1890s, the area was reached by a railroad, and Portland was incorporated in 1893. With the railroad allowing easier transport of timber, Portland entered the logging industry, with four large mills running in the early 1900s. Since then, the town's main business has come from agriculture, with many old, established farms located in the surrounding area.
Every edition of the U.S. Geological Survey’s map of Portland. Tap a year, or press play to watch the town change.
1935Wilmot sheet · 1:62,500
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Portland.
Every building
Portland, building by building, 1908–1912
Fire insurance maps drew every building, what it was made of and what it was used for, so insurers could price the risk of fire. Pick a year, then a sheet.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021). How TownRatings grades history →
From Wikimedia Commons (7), Wikidata (1), the National Register of Historic Places (5), Wikipedia, Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), the US Post Offices dataset (Blevins & Helbock), the USGS Geographic Names Information System and Sanborn fire insurance maps (Library of Congress). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.