St. Louis, MO, August 22, 2026 —

St. Louis City and St. Louis County are marking a significant historical milestone: the 150th anniversary of their separation. This event, often referred to as the ‘Great Divorce,’ officially occurred in 1876, fundamentally altering the political and administrative landscape of the region.

The separation was the culmination of decades of growing tension and differing interests between the rapidly urbanizing city and the more rural surrounding county. The city, experiencing significant growth and seeking greater autonomy, felt constrained by county governance. Conversely, county residents often felt that the city’s needs and development were prioritized over their own.

This divergence in needs and perspectives led to the formal split, establishing the City of St. Louis as an independent city, separate from the jurisdiction of St. Louis County. This administrative division created a unique governmental structure within the St. Louis metropolitan area, a structure that persists to this day.

The 150th anniversary provides an opportunity for reflection on the history of this separation and its ongoing impact. Commemorative events and discussions are expected to explore the circumstances that led to the split, the consequences of the division, and the evolving relationship between the city and the county over the past century and a half.

The ‘Great Divorce’ serves as a notable case study in municipal governance and the challenges of managing the growth and development of distinct urban and suburban entities within a single metropolitan region. The anniversary is being observed by both city and county officials and residents, highlighting a shared history that continues to shape the identity of the St. Louis area.



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