Zohran Mamdani, a self-described Democratic socialist, is poised to make history on January 1, 2026, as the first Muslim mayor of New York City and one of the youngest mayors in over a century at just 34 years old. His election represents a significant milestone in the city’s political and demographic evolution. Mamdani rose from serving as a State Assembly member to capturing the mayoralty, largely through grassroots organizing in Queens and by appealing to younger voters. He won the election with 50.78% of the vote, defeating Republican Curtis Sliwa and independent Andrew Cuomo. The contest drew national attention, in part due to commentary from prominent figures, including former President Donald Trump, highlighting the heightened interest in New York City’s political future.

Despite the historic nature of Mamdani’s victory, a historical discrepancy has emerged regarding his official numerical designation as mayor. Historian Paul Hortenstine, who specializes in early New York City mayors and colonial records, claims that an error in official records has miscounted the sequence of mayors. According to Hortenstine, Matthias Nicolls’ nonconsecutive second term in 1675 was omitted, a detail overlooked for centuries. If corrected, this would adjust Mamdani’s designation from the 111th to the 112th mayor of New York City. Hortenstine emphasized the importance of accuracy in documenting mayoral history, noting that longstanding errors can significantly affect the historical record.

The error traces back to an 1841 city guide that failed to list Nicolls’ second term, and this oversight has been perpetuated in subsequent records. Similar to how nonconsecutive presidential terms are counted separately, missing a mayoral term has a domino effect on numbering. Historian Peter R. Christoph collaborated with Hortenstine to document the discrepancy, providing extensive evidence of how Nicolls’ second term was historically overlooked. If accepted officially, all future records, ceremonial documents, and historical accounts would need to be updated to reflect this adjustment, ensuring consistency in the city’s official mayoral sequence.

City officials are aware of Hortenstine’s findings and have acknowledged the significance of reviewing historical records. Ken Cobb from the Department of Records stated that while the department preserves records rather than creates them, oversights can persist until thoroughly examined. Historical precedents exist, such as the retroactive recognition of Charles Lodwick’s 1694–1695 term, which caused a shift in subsequent mayoral numbering. Should Nicolls’ second term be formally recognized, this could similarly shift Mamdani’s numerical designation, illustrating the complex relationship between historical documentation and official civic recognition.

Misnumbering of mayors is not unprecedented. In 1989, Peter R. Christoph published an essay highlighting that Edward I. Koch, long considered the 105th mayor, was actually the 106th due to earlier record-keeping errors. Nearly 99 mayors had been misnumbered because of these historical oversights, demonstrating the challenges of maintaining accurate documentation in a city with such a long and intricate history. This context helps explain the current discrepancy affecting Mamdani’s official designation and underscores the importance of careful research in preserving the integrity of civic records.

Ultimately, while the potential adjustment in mayoral numbering does not affect Mamdani’s authority or historic achievements, it highlights the nuanced ways that historical records shape public understanding of political milestones. His election represents generational, religious, and ideological shifts in New York City politics, yet it is intertwined with centuries-old documentation practices. The review of Nicolls’ overlooked term serves as a reminder that history is often more complex than it appears, and that meticulous record-keeping is essential for ensuring accurate recognition of civic leadership. As Mamdani prepares to assume office, both historians and city officials face the task of reconciling historical accuracy with the symbolic significance of groundbreaking political achievements.