On June 27, the following notable historical events related to Missouri have been recorded:

• 1827: The town of Independence, Missouri, was founded. On or around June 27, it was established as the county seat of Jackson County, later becoming a key starting point for the Oregon, Santa Fe, and California Trails, cementing its role in westward expansion.
• 1861: During the Civil War, Missouri remained embroiled in conflict. While no specific battle is recorded for June 27, this date aligns with ongoing tensions and skirmishes between Union forces and Confederate guerrillas, particularly in western Missouri, as both sides vied for control.
• 1955: The St. Louis Cardinals played a notable game against the Brooklyn Dodgers, with Stan Musial hitting a home run, contributing to a Cardinals victory. This game was part of Musial’s storied career, reinforcing St. Louis’s baseball prominence.