The Dallas County Courthouse, built in 1892 of red sandstone with rusticated marble accents, is a historic governmental building located at 100 South Houston Street in Dallas, Texas. Also known as the Old Red Courthouse, it became the Old Red Museum, a local history museum, in 2007. In 2021, it was announced that the Old Red Museum would be moving out and the building is being returned into a hall of justice. The Texas Fifth Circuit Court of Appeals is moving into Old Red (2024).

It was designed in the Richardsonian Romanesque style of architecture by architect Max A. Orlopp, Jr. of the Little Rock, Arkansas based firm Orlopp & Kusener. President John F. Kennedy's motorcade passed the courthouse minutes before his assassination on November 22, 1963. In 1966, the courthouse was replaced by a newer building nearby. On December 12, 1976, it was added to the National Register of Historic Places. In 2005–2007 the building was renovated.

• 
  Museum interior
• 
  Early Years Gallery
• 
  Trading Center Gallery
• 
  Big "D" Gallery
• 
  World Crossroads Gallery
• 
  Children's Education Center
• 
  Dallas County Courthouse postcard, circa 1909

• List of county courthouses in Texas
• List of Dallas Landmarks
• List of National Historic Landmarks in Texas
• National Register of Historic Places listings in Dallas County, Texas
• Recorded Texas Historic Landmarks in Dallas County

• Media related to Old Red Museum at Wikimedia Commons