Etna Township, Kosciusko County, Indiana

Twin Lakes is an unincorporated community in West Township, Marshall County, Indiana.

Chief Menominee Memorial Site is a historic site located in West Township, Marshall County, Indiana. The memorial site was dedicated in 1909, and includes a triangular park, remains of the replica chapel foundation stones, and the Chief Menominee Monument. The log replica chapel was destroyed by fire in 1920. The Chief Menominee Monument is a 17-foot tall granite monument dedicated to the memory of Chief Menominee. It is the first monument to a Native American erected under a state or federal legislative enactment. It was listed on the National Register of Historic Places in 2010.

The Hoham-Klinghammer-Weckerle House and Brewery Site, located in Plymouth, Marshall County, Indiana is connected to three German families, all related through marriage, that settled in the area in 1844–1865. The Hoham, Klinghammer, and Weckerle families established and operated the Plymouth Brewery from 1857 to 1888. Among several buildings that existed at brewery site was a Stick/Queen Anne style house, now the only remaining building at the site.The exact date and builder of the house is not known, construction started prior to 1882, probably by the Klinghammers. The largely brick house has two full floors and a half story top floor. A partially exposed full basement adds to the overall height of the house. Two brick vaults are buried fifty feet west of the house and were a part of the original brewery building.

Plymouth Downtown Historic District is a national historic district located in Plymouth, Marshall County, Indiana, United States. The district encompasses 47 contributing buildings and one contributing structure in the central business district of Plymouth. It developed between about 1870 and 1940, and includes examples of Italianate, Romanesque Revival, and Colonial Revival style architecture. Located in the district is the separately listed Plymouth Fire Station. Other notable buildings include the Montgomery Ward Building (1929), Metsker Block (c. 1910), Rentschler Building (1910), Early Plymouth Post Office (1884), First National Bank-Plymouth City Hall (1879, 1916), Packard Bank Block (1879), Simons Building (1895), Wheeler Block (c. 1865), Bank Block (c. 1880), Bank Block-Masonic Temple (1901), Plymouth Post Office (1935), and Plymouth Motor Sales (1929).It was listed on the National Register of Historic Places in 1998. The Historic District comprises approximately four blocks of the original plat of Plymouth, laid out in 1834. The town is situated on the high north and west banks of the Yellow River, and along the north-south alignment of the Michigan Road. The district consists of generally continuous facade lines of masonry constructed commercial structures built from about 1870 to 1960. With few exceptions, the buildings retain a high level of integrity to their original appearance.

Plymouth Fire Station is a historic fire station located at Plymouth, Marshall County, Indiana. It was built in 1875, and is a two-story, painted brick building with a 59-foot tall bell tower. It features round-arched pedestrian entrances and bays, parapet with tile coping, and a round window in the bell tower.: 2 It was listed on the National Register of Historic Places in 1981. It is located in the Plymouth Downtown Historic District.

Plymouth is a city in Marshall County, Indiana, United States. The population is 10,214 in the 2020 census. It is the county seat of Marshall County. Plymouth was the site of the first retail outlet of defunct U.S. retailer Montgomery Ward in 1926.

Marshall County Courthouse is a historic courthouse located at Plymouth, Marshall County, Indiana. It was built between 1870 and 1872, and is a two-story, brick and limestone building in a combination of Italianate and Renaissance Revival styles. It is rectangular in form and has a hipped roof with central bell tower.: 2 It was listed in the National Register of Historic Places in 1983. It is located in the Plymouth Northside Historic District.

East LaPorte Street Footbridge is a historic footbridge located at Plymouth, Marshall County, Indiana. It was built in 1898 by the Rochester Bridge Company and spans the Yellow River. It is a two-span, Kingpost truss bridge measuring 100 feet long and 6 feet wide. The bridge connects a residential area of Plymouth to River Park Square and downtown.: 2 It was listed on the National Register of Historic Places in 1981.

Plymouth Southside Historic District is a national historic district located at Plymouth, Marshall County, Indiana. The district encompasses 91 contributing buildings, 2 contributing structures, and 1 contributing object in a predominantly residential section of Plymouth. It developed between about 1853 and 1953, and includes examples of Italianate, Greek Revival, Queen Anne, Colonial Revival, and Tudor Revival style architecture. Notable contributing resources include the John McFarlin, Jr., House (c. 1860), Trinity United Methodist Church (1926), Bible Baptist Church (1894), Felke Florist and Greenhouse (1922), John Soice Residence (c. 1875), Westervelt-Marble Residence (c. 1865, 1899), and Edwards-Gambel Residence (1856).It was listed on the National Register of Historic Places in 2013.

Plymouth Northside Historic District is a national historic district located at Plymouth, Marshall County, Indiana. The district encompasses 141 contributing buildings, 2 contributing sites, 6 contributing structures, and 3 contributing objects in a predominantly residential section of Plymouth. It developed between about 1870 and 1940, and includes examples of Italianate, Gothic Revival, Queen Anne, Colonial Revival, Tudor Revival, Neoclassical, and Renaissance Revival style architecture. Located in the district is the separately listed Marshall County Courthouse. Other notable contributing resources include Magnetic Park (c. 1885, 1937), First United Methodist Church (1914-1915), J.C. Capron House (1900), Samuel Schlosser House (1910-1911), Clay Metsker House (1917-1918), Plymouth Church of the Brethren (1950-1951), Logan-Stanley Fountain (c. 1902), Stevens House (1895), and First Presbyterian Church (1896-1897).It was listed on the National Register of Historic Places in 2013.

Heminger Travel Lodge is a historic hotel located on the Lincoln Highway at Plymouth, Marshall County, Indiana. It was built in 1937, and is a two-story, Colonial Revival style brown brick building with a red clay tile gable roof. Attached to the building is a one-story "sun porch" with a hipped roof.: 5 It was listed on the National Register of Historic Places in 2000.

Plymouth High School is a public high school located in Plymouth, Indiana, United States.