Portland (CDP), Connecticut

The Marlborough Street Historic District encompasses one of the finest collections of 19th-century residential architecture in Portland, Connecticut. Extending along Marlborough Street (Connecticut Route 66) east of Main Street, it includes twelve houses built between 1847 and 1900 in a variety of architectural styles. The district was listed on the National Register of Historic Places in 1983.

The White-Overton-Callander House is a historic house museum at 492 Main Street in Portland, Connecticut. Built in the 1710s, it is one of the community's oldest surviving buildings, built by Nathaniel White, one of the first proprietors of Middletown. Owned since 1997 by the local historical society, it is open for tours on some Sundays. It was listed on the National Register of Historic Places in 2013.

The Joseph Williams Octagon House and the Gilbert Stancliff Octagon House are once-identical historic mid-1850s octagon houses located next to each other at 26 and 28 Marlborough Street in Portland, Connecticut. Constructed of Portland brownstone in the 1850s, they are distinctive as the only known pair of little-altered octagon houses in the state. The pair of houses, also known as the Octagon House Pair, was added to the National Register of Historic Places in 1976.

Elmcrest Hospital, later St. Francis Care Behavioral Health, was a small psychiatric facility in Portland, Connecticut. Opened in 1942, the campus incorporated three historic mansions, including a childhood home of 1800s businesswoman Elizabeth Jarvis Colt. The facility was purchased by Saint Francis Hospital in 1997, and in 1998, the hospital underwent increased scrutiny when an 11-year-old patient died while being restrained by an employee. In 2003, inpatient services at the campus were discontinued, and patients were relocated to the Saint Francis Mount Sinai campus. Hartford Hospital purchased the campus in 2003 and continued operating the outpatient and partial hospitalization services for children and teens at the site through its affiliate the Rushford Center. Rushford discontinued operations at the site c. 2006. A redevelopment plan that would have demolished two of the three historic homes was proposed in 2006, however the original effort had stalled by 2009. On February 1, 2018, the Portland Planning and Zoning Commission voted unanimously to approve the Brainerd Place development for the site. As of 2022, the project is expected to include a mix of apartments and retail, while adaptively redeveloping the three historic homes in place.

Portland is a town in Middlesex County, Connecticut, United States. The town is part of the Lower Connecticut River Valley Planning Region. The population was 9,384 at the 2020 census. The town center is listed as a census-designated place (CDP). It is situated across the Connecticut River from Middletown. Brownstone quarried in Portland was used in the construction of Hartford's Old State House in 1796. The vast majority of the brownstone buildings in Connecticut (see College Row at Wesleyan University and the Long Walk at Trinity College) as well as the famous brownstones in New York City were built with brownstone from Portland's quarries. Later, one of the quarries was transformed into an adventure park in the summer months featuring zip lines, cliff diving and scuba locations. About half of the town's perimeter is made up of the Connecticut River. The town has eight marinas and boat clubs as well as three 18-hole golf courses.

The Portland Brownstone Quarries are a set of historic quarries in Portland, Connecticut. The brownstone mined from these quarries was an important source for construction in the latter half of the 19th century. The stone from these quarries was used in a number of landmark buildings in Chicago, Boston, New York City, Philadelphia, Baltimore, Washington, D.C., New Haven, Connecticut, and Hartford. The site was listed as a National Historic Landmark, which also placed it on the National Register of Historic Places, on May 16, 2000.

The Middletown Upper Houses Historic District, also known as the Upper Houses River Port, encompasses the historic early nucleus of Cromwell, Connecticut. Sandwiched between Main Street and the Connecticut River, this area was set off from neighboring Middletown in 1851. It is visually dominated by residential structures built before 1810. The area grew as a significant river port and shipbuilding center until the mid-19th century. The district was listed on the National Register of Historic Places in 1979.

The Arrigoni Bridge, also known locally as the Portland Bridge is a steel through arch bridge carrying Route 66 and Route 17 across the Connecticut River, connecting Middletown, Connecticut, to Portland, Connecticut. When it opened in 1938, the 1,200 feet (370 m) bridge was the most expensive bridge ever built in Connecticut, at a cost of $3.5 million. Its two distinctive 600 feet (180 m) steel arches have the longest span length of any bridge in the state. The bridge has an average daily traffic of 33,600.It was named after state legislator Charles J. Arrigoni, who promoted the project. Arrigoni served in the Connecticut House of Representatives from 1933 to 1936 and in the Connecticut State Senate from 1937 to 1940.

The Middletown–Portland railroad bridge is a swing truss railroad bridge crossing the Connecticut River and Route 9 in Middletown, Connecticut, just south of the Arrigoni Bridge. The bridge is a Warren through-truss swing bridge with an overall length of 1,142 ft (348 m) and a rotating center span. It is used by the Providence and Worcester Railroad to serve freight customers in Portland.The first rail bridge at the site was constructed by the Boston and New York Air-Line Railroad in 1873. It was replaced by the current bridge in 1911. The bridge was featured prominently in the video for the 1993 Billy Joel hit "The River of Dreams".

The Mattabesset River as delineated on present-day maps flows out of Harts Ponds in the town of Berlin and travels 16.1 miles (25.9 km) east to the Connecticut River, passing Kensington and later forming the boundary between Middletown and Cromwell.Further south, the Coginchaug River (or "winding meadow") flows from an upland meadow in Durham, northwards to the Mattabesset just upstream of that river's junction with the Connecticut. This river was the route to the portage place, located near Palmer Field, just below Sowheag's main stronghold at Indian Hill. Since it was the old western boundary of the incorporated City of Middletown, it was also called the West River, and also, for no known reasons, it was given other names, including the Sebethe River and the Arrawanna River. Presumably the word Mattabeseck was never considered properly euphonious, and various local individuals tried to improve on the name poetically.

The Indian Hill Avenue Historic District encompasses an 18th-century colonial shipbuilding village, overlaid on a historic and prehistoric Native American settlement, in Portland, Connecticut. Extending along Indian Hill Avenue north of Portland, the district includes a collection of 18th and early 19th-century buildings, and extensive archaeological evidence of Native American occupation (some supported by colonial-era and later documentation). The district was listed on the National Register of Historic Places in 1983.

The Main Street Historic District encompasses the historic commercial center of Middletown, Connecticut, United States. Middletown was one of the most important ports on the Connecticut River during the colonial period, and Main Street "has been the center of community life since the earliest period of settlement". Today Main Street is home to a number of 19th century buildings, maintaining the bulk of its historic character. It was listed on the National Register of Historic Places in 1983.