Which place in the United States has 3 electoral votes but is not a state?

Washington D.C. has 3 electoral votes despite not being a state. This is due to the 23rd Amendment to the U.S. Constitution, ratified in 1961, which allows the District of Columbia to participate in presidential elections. The amendment mandates that D.C. is allocated electors equal to the number of electors in the least populous state, which is currently three. This provision was enacted to ensure that residents of D.C., who were previously disenfranchised in federal elections, could have representation when voting for the President and Vice President of the United States.

While Puerto Rico, Guam, and American Samoa are U.S. territories and have various forms of self-governance, they do not have electoral votes in presidential elections. Thus, Washington D.C. stands out as the only non-state entity with electoral votes.