Count: 0 — No official U.S. state capitals start with the letter X. This count covers all 50 state capitals, Washington, D.C., and the capitals of U.S. territories. Authoritative sources such as the U.S. Census Bureau and official state government listings confirm there are no entries that meet the criteria. Interesting detail: the letter X does appear in place names across the Americas with Spanish or indigenous roots (for example, Xalapa in Mexico), but it does not begin the name of any U.S. state capital.

Understand that this absence reflects language and history. X is a rare initial letter in English and in the naming traditions that produced U.S. capitals; early American place names mostly come from English, Native American, French, and Spanish sources that rarely use X at the start in English spelling. Some U.S. towns begin with X — for example, Xenia, Ohio — and a few county seats or small municipalities use X, but none qualify as state or territorial capitals. Check the A–Z index of U.S. capitals for usable lists by letter or explore international capitals for examples that do begin with X.