Valle Township, Jefferson County, Missouri

Summer Set is an unincorporated community and census-designated place (CDP) in Jefferson County, Missouri, United States. It is in the southern part of the county, 3 miles (5 km) south of De Soto. It is a residential community built around three artificial lakes: Summerset Lake, Winterhaven Lake, and Spring Lake. Summer Set was first listed as a CDP prior to the 2020 census.

McMullen Branch is a stream in Jefferson County in the U.S. state of Missouri.McMullen Branch has the name of the local McMullen family.

Vineland is an unincorporated community in Jefferson County, in the U.S. state of Missouri.

Louis J. and Harriet Rozier House is a historic home located at De Soto, Jefferson County, Missouri. It was built in 1887, and is a two-story, asymmetrical, Queen Anne style frame dwelling. It sits on a rock-faced limestone foundation and has a hipped roof and lower cross gables. It features a one-story wraparound porch, spindlework, and fishscale shingles.: 5 It was listed on the National Register of Historic Places in 2006.

Central School Campus, also known as Central School and DeSoto High School, is a historic school complex located at De Soto, Jefferson County, Missouri. The Central School was built about 1882, and remodeled into its current form in 1950. It is a 2 1/2- to 3-story rectangular brick building. The DeSoto High School was built in 1927, and is a three-story, textured brick building with a flat roof and accented with limestone or cast stone ornament reflecting the Classical Revival style.: 5 It was listed on the National Register of Historic Places in 2009.

De Soto is a city in Jefferson County, Missouri, United States. The population was 6,449 at the 2020 census and the city is part of the St. Louis metropolitan area. The Van Metre family were first to settle in 1803. The town was organized in 1857 and is named for the explorer Hernando De Soto, who claimed the Louisiana Territory for Spain. De Soto was the city closest to the mean center of U.S. population in 1980. The city celebrated its Bicentennial in 2003. The city made national news on and after May 6, 2003, when straight-line winds and a tornado struck.

Briarwood Estates is an unincorporated community and census-designated place (CDP) in Jefferson County, Missouri, United States. It is in the southern part of the county, northwest of De Soto. It is a residential community built around three lakes: Lake Briarwood, Fishermans Lake, and Spring Lake. Missouri Route 21 passes between Briarwood Estates and De Soto, leading northeast 44 miles (71 km) to St. Louis and southwest 24 miles (39 km) to Potosi. Briarwood Estates was first listed as a CDP prior to the 2020 census.

Blackwell is an unincorporated community in a small part of Washington County and the extreme northern section of St. Francois County, Missouri, United States. It is located approximately seven and a half miles south of De Soto. A variant name was "Blackwell Station". A post office called Blackwells Station was established in 1858, and the name was changed to Blackwell in 1885. The community has the name of Lavinia Blackwell and Margaret Blackwell, first settlers.

KDJR (100.1 FM) is a non-profit Christian radio station broadcasting a Religious music format. Licensed to De Soto, Missouri, United States. The station is currently owned by Family Worship Center Church.

Mill Creek is a stream in Washington and St. Francois counties of eastern Missouri. It is a tributary of the Big River. The stream source is located at: 37°56′29″N 90°43′25″W near Mineral Point and the confluence with Big River is at: 38°02′10″N 90°37′11″W just south of Blackwell.

Melzo is an unincorporated community in southern Jefferson County, in the U.S. state of Missouri. The community is located on Missouri Route E just north of the Jefferson-St. Francois county line. DeSoto is eight miles to the north and Bone Terre is approximately six miles to the south.

Valles Mines is an unincorporated community in southern Jefferson County, Missouri, United States. It is located approximately seven miles south of De Soto. It is located on Missouri Route V less than one mile west of U.S. Route 67. Joachim Creek flows past the north side of the community. The ZIP Code for Valles Mines is 63087.A post office called Valles Mines was established in 1826. The community is named after François Vallé, who established lead mines there in the 18th century.