Posey County is the southernmost, southwesternmost, and westernmost county in the U.S. state of Indiana. Its southern border is formed by the Ohio River, and its western border by the Wabash River, a tributary to the Ohio. As of 2020, the population was 25,222. The county seat is Mount Vernon. Posey County is part of the Evansville, Indiana metropolitan statistical area. The Ports of Indiana-Mount Vernon, on the Ohio River, is the seventh-largest inland port complex in the nation. Mechanization of dock technology has altered the number of workers at the port, but Posey County is still the seventh-largest internal port in the United States, based on the tons of materials handled. Grain from the Midwest is among the products shipped.
Union High School (Modoc) is a small high school located in Union Township, Modoc, Indiana. However, the official name is Union Junior and High School. It is one of five high schools in Randolph County, Indiana. In 2004 Union High School was named an Indiana Four Star School by the Indiana Department of Education. The school is a member of the Indiana High School Athletic Association (IHSAA), which is the governing body for high school sports in the state of Indiana.
Mater Dei High School or Evansville Mater Dei High School is a private Catholic high school on the west side of Evansville, Indiana, constructed in 1949. It is one of two Catholic high schools that serve the students of Vanderburgh, Posey, Gibson, and Warrick counties as part of the Roman Catholic Diocese of Evansville.
Seeger Memorial Junior-Senior High School is the single high school and middle school serving Warren County, Indiana, and is located a mile and a half north of the town of West Lebanon. It is administered by the Metropolitan School District of Warren County in Williamsport.
Barr-Reeve Junior/Senior High School is a public secondary school located in Montgomery, Indiana, United States. It serves grades K-12 for the Barr-Reeve Community Schools.
Castle High School, previously known as John H. Castle High School is a public high school located about a mile northeast of Newburgh, Indiana on Indiana 261. Castle is one of three high schools in the Warrick County School Corporation. Until 2020, it was the only non-Evansville school that played in the Southern Indiana Athletic Conference as well as the largest high school in southwestern Indiana by enrollment. Castle High School offers classes in agriculture, art, business and computers, English, family and consumers science, industrial technology, mathematics, music and fine arts, physical education, science, social studies, resource education, and world languages. Castle also offers advanced placement classes in English language, English literature, calculus, chemistry, US history, biology, government, macroeconomics, art history, and CS principles.
The Pocket Athletic Conference (PAC) is a high school athletic conference in Southwestern Indiana with its headquarters at Forest Park. It is the largest athletic conference in the state of Indiana with 13 member schools. The conference is composed primarily of Class 3A schools, with a few 2A and one 1A. Schools are currently located in Daviess, Dubois, Gibson, Perry, Pike, Posey, Spencer, and Warrick counties.
The Southern Indiana Athletic Conference (SIAC) is a high school athletic conference based in Evansville, Indiana. Five of the conferences 10 schools; Bosse, Central, Harrison, North, and Reitz; comprise the public Evansville Vanderburgh School Corporation. Mater Dei and Memorial are private Catholic high schools ran by the Roman Catholic Diocese of Evansville, and the largest member is Castle, a public school located in neighboring Newburgh in Warrick County under the Warrick County School Corporation. The league was founded in 1936, and at one point stretched far across southern and western Indiana: from Mount Vernon in the west to New Albany in the east, and from Evansville in the south to Terre Haute in the north. Jasper and Vincennes Lincoln announced in May 2019 that they would leave the disbanding Big Eight Conference to rejoin the Southern Indiana Athletic Conference beginning with the 2020–21 season.
The Three Rivers Conference is a high school athletic conference in northeast Indiana, consisting of schools in Cass, Fulton, Miami, Wabash, and Whitley counties.
Tell City Jr.-Sr. High School is a public school in Tell City, Indiana.
South Spencer High School is a public high school in Reo, Indiana. The school educates about 471 students in grades 9 to 12 in the South Spencer School Corporation district.
Wadesville is an unincorporated area in northern Center Township, Posey County, in the U.S. state of Indiana. It lies along State Road 66 northeast of the city of Mt. Vernon, the county seat of Posey County. Although Wadesville is unincorporated, it has a post office, with the ZIP code of 47638.
The Northern Lakes Conference of Indiana (NLC) is an IHSAA-sanctioned athletic conference of high schools located within Elkhart, Kosciusko, Marshall and St. Joseph counties in northern Indiana, United States.
Central Indiana Conference is an eight-member IHSAA Conference spanning Blackford, Grant, and Madison Counties.
The Greater South Shore Conference is an eight-member Indiana High School Athletic Association athletic conference spanning Lake and Porter counties in Northwest Indiana. Two other members, Boone Grove and Gary West Side, participate only in football, with Boone Grove otherwise participating in the Porter County Conference and Gary West Side otherwise participating in the Great Lakes Athletic Conference.
The Hoosier Athletic Conference is a ten-member IHSAA-Sanctioned conference located within Benton, Cass, Hamilton, Howard, Jasper, Tippecanoe, Tipton and White counties. The conference first began in 1947, and has been in constant competition except for the 1997–98 school year, when membership dropped to three schools. The conference added four schools from the folding Mid-Indiana Conference in 2015. Lewis Cass exited the conference in 2023 and Logansport was added as the replacement starting in 2024. In 2024 Northwestern will exit the conference filling in for North Miami in the Three Rivers Conference.
The Metropolitan School District of Mt. Vernon, Indiana, also known as simply the MSD of Mt. Vernon or MSDMV, is the school corporation serving the City of Mt. Vernon and southern Posey County and is the larger of two school districts in the county.
The Metropolitan School District of North Posey County, Indiana, commonly known as the MSD of North Posey, is the school corporation serving northern Posey County, Indiana.
The Western Boone Junior-Senior High School, colloquially called WeBo, is a public high school located in Thorntown, Indiana.
Mount Vernon High School is a public high school in Mount Vernon, Indiana and is part of the M.S.D. of Mount Vernon.
