At his peak adult height in the late 1960s and early 1970s, Henry Kissinger measured 5 feet 8 inches (173 cm). By the standards of mid-20th-century American males, this placed him right at the national median. It did not make him short, but it certainly prevented him from physically dominating diplomatic bilateral sessions.
As the decades advanced, natural spinal compression took a measurable toll. By the time he published his late-career volumes on world order and artificial intelligence in the 2010s and early 2020s, his standing stature had declined toward 5 feet 5 inches or 5 feet 6 inches. In his nineties, he increasingly used a cane, then a wheelchair, accentuating his compact silhouette during public addresses and university lectures.
Online databases frequently misquote his numbers. Skeptical internet threads on Reddit and historical message boards regularly guess his height as low as 5 feet 4 inches or as high as 5 feet 11 inches. The former stems from late-life photos where he appeared stooped beside contemporary heads of state, while the latter reflects confusion with his larger-than-life media standing during the 1973 shuttle diplomacy era.