What is the proper term for describing all 50 states in the USA, without including territories etc
The 48 mainland state are referred to as the "contiguous united states", I can't seem to find the word for "All 50 states, including Hawaii and Alaska, not including Guam and Puerto Rico". I can't help but feel like there should be a more professional term than "all of the states"
A frequent term is just "the 50 states." Using the number 50 is more common than spelling out fifty and by explicitly noting 50 it is unlikely anyone thinks you are including the non-states which would be objects 51 and 52.
You could also refer to "the States" but this is a little more ambiguous as "the States" is often used as a nickname for "the United States."
By the way, the "contiguous United States" does not inherently exclude the District of Columbia. The context of its usage will determine whether the reader considers D.C. part of the term.
I'd think "United States of America" includes ALL the states. PR is a commonwealth.
Consider "The Fifty States."