John McComb Jr. (1763–1853) was an American architect who designed many landmarks in the 18th and 19th centuries. Between 1790 and 1825, McComb was New York city's leading architect.^[1]

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McComb Jr. was born on October 17, 1763, in New York City and was of Scottish ancestry.^[2] In 1783, McComb began working with his father, John McComb Sr., a well known architect and surveyor. In 1790, he began working independently^[3] and John Jay spoke highly of his work to Alexander Hamilton.^[4] McComb would later design Hamilton's home, The Grange. In general, McComb worked in the Federal style.

McComb died in 1853, and is interred at Green-Wood Cemetery in Brooklyn, New York.

• Old Cape Henry Light (1792), first lighthouse totally authorized by the federal government.
• Montauk Point Lighthouse (1796)
• Station Eatons Neck Lighthouse (1798)
• Gracie Mansion (1799)^[5]
• St. Mark's Church in-the-Bowery (1799)
• Hamilton Grange (1802)^[5]
• New York City Hall (1803)^[6]
• St. John's Chapel (New York City) (1803, demolished 1918)
• Old Queens building at Rutgers University (1808)
• Castle Clinton (1808)
• Washington Hall (1809)
• Alexander Hall, Princeton Theological Seminary (1815)

• Montauk Point Lighthouse (1796)
• New York City Hall (1803)
• Old Queens at Rutgers University (1808)
• Alexander Hall, Princeton Theological Seminary (1815)