National Register of Historic Places

Fort O'Brien

Machiasport, Washington County, Maine
Listed
September 30, 1969
Type
Structure
Period
Early Republic
Ref No.
69000024

About this property

Fort O'Brien State Historic Site, also known as Fort Machias, preserves the remains of a fort located in Machiasport, Maine that was built and destroyed three times over a 90-year period. It was involved in military actions during the American Revolutionary War and the War of 1812, and was listed on the National Register of Historic Places. It is now managed by the Maine Department of Conservation's Bureau of Parks and Lands, and is open between Memorial Day and Labor Day. Fort O'Brien is located on the western shore of the Machias River, a short way north of its mouth at Machias Bay and south of the village center of Machiasport. It is a roughly 2-acre (0.81 ha) parcel, with a small parking area and a grassy area near the riverbank where the fortifications originally stood. Earthworks and a flagpole mark the location of the Civil War defenses, while the Revolutionary War-era earthworks, located just to their north, are obscured by scrubby growth. When the American Revolutionary War broke out in April 1775, the Machias area became one of interest to British authorities in besieged Boston as a source of lumber and supplies. An expedition to the area to acquire materials resulted in the naval Battle of Machias on June 11–12, 1775, in which a small Royal Navy ship was captured by the colonists led by Jeremiah O'Brien, for whom the fort is named. After this event a number of fortifications were erected on the Machias River, including a four-gun battery at this point. This fortification was destroyed when the British returned in force in 1777, sparking a second battle. In the War of 1812, American forces garrisoned the fort, which often held British POWs brought in by privateers. In 1814, the British returned to Machias, destroying this fortification and burning its barracks in 1814. A five-gun battery was installed at the site in 1863, during the American Civil War, but saw no action. Although its military equipment was removed, a Civil War-era 12-pound "Napoleon" cannon now stands on site. The fortification was deeded to the state by the federal government in 1923. National Register of Historic Places listings in Washington County, Maine Fort O'Brien State Historic Site Department of Agriculture, Conservation and Forestry Fort O'Brien and Fort Machias at NorthAmericanForts.com

Location

Machiasport, Washington County, Maine
44.68965, -67.39600

Categories

MILITARY
National Register nomination ›
Sources

Property data from the National Register of Historic Places, National Park Service (public domain).

Description adapted from Wikipedia under the Creative Commons Attribution-ShareAlike 4.0 International License.

Unlimited access

Everything a full report reveals about Fort O'Brien

This page lists Fort O'Brien. A full Aubrey report for an address near it pulls together this listing alongside battlefield records, land patents, and every other historical record within a chosen radius:

Overview
An interactive map of the location with historic sites, battles and Native heritage plotted, and its full story era by era.
The Land
The historic sites and place names around the location, and how this land was settled and used.
Geology
The bedrock beneath the site, its age and rock type, reaching back millions of years.
LiDAR Terrain
Laser-scanned terrain that reveals earthworks and old features hidden in the landscape.
Conflict & War
The battles, raids and skirmishes fought near here, across every era of American conflict.
The Civil War
The Civil War on this ground, 1861 to 1865: who held it, and the battles, camps and regiments nearby.
The Soldiers
The men who marched from here in the Civil War, named and traced where the record allows.
Native Heritage
The Native nations who held this land, mapped across time from before European contact to today.
Settlement
Who claimed and held this ground, from Indigenous homelands through the colonial powers to the United States.
The Community
How the town grew, who came, and what kind of place it became, traced through the census record.
Rivers & Rail
The rivers, canals and railroads that connected this place between 1830 and 1911.
Notable People
The people born, buried or genuinely tied to this exact place, with their stories.
Historical Maps
Historic maps of the location layered over how it looks today.
Finds & Access
Museum objects tied to the area, and the laws on searching, collecting and access here.
Literature
The old books, county histories and archives that mention this place, quoted with their sources.
Spotlight
A deep dive into the most remarkable, lesser-known history of the place, traced back to the record.
Points of Interest
The most significant historic sites and landmarks near the location, and why they matter.
Timeline
The whole story of the location told era by era, from first peoples to the present day.
First month just $5.99, then $11.99 a month. Unlimited locations, cancel anytime.

Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.

Start your Fort O'Brien report
Or see a real report first

Nearby Historic Sites

Gates House
Industrial
0.5 mi
Liberty Hall
Industrial
0.6 mi
"The Rim" and Site of Fort Foster
Early Republic
2 mi
Lion, The (locomotive)
Industrial
3.2 mi
East Machias Historic District
Colonial
3.3 mi

Nearby Battles

Battle of Machias
1775Revolutionary War
3.6 mi
Battle of Machias (Maine 1775)
1775Revolutionary War
3.8 mi

Questions about this property

When was Fort O'Brien listed on the National Register?

Fort O'Brien was listed on the National Register of Historic Places on September 30, 1969.

What type of historic resource is Fort O'Brien?

Fort O'Brien is classified as a structure in the National Register of Historic Places.

What is the period of significance for Fort O'Brien?

The period of significance for Fort O'Brien is recorded as the early_republic era.

Can I research the history near Fort O'Brien?

Yes. Aubrey Research reports search National Register listings, battlefield records, land patents, and other primary historical sources within any radius of a US address. A report for an address near Fort O'Brien will include this listing and all other historical records in the area.

More in Washington County

Historic places, battles, and census history across Washington County.

Explore WashingtonCounty ›

More historic places in Maine

Browse all historic places in Maine.

View Mainehistoric sites ›

Conflict records

Explore 19,000+ military engagements across American history.

Browse US conflicts ›

Maine history

Colonial settlement, territorial period, and statehood narrative.

Mainehistory ›

Research the history near this site

An Aubrey US report for an address near Fort O'Brien will include this listing alongside battlefield records and other historical sources within your chosen radius.

Research your locationView a free sample report