Utah still has death by firing squad as an option. Most folks are familiar with the choices of electrocution and lethal injection, but what are some of the other options in the US?
http://www.deathpenaltyinfo.org/article.php?did=121&scid=11
Basically, there’s the options you’ve listed, plus lethal gas. Washnigton and New Hampshire retain hanging as an option, which was abandoned by Delaware last year (they dismatled their gallows). There’s a few states other than Utah which have the firing squad as a secondary option.