Outstanding US States in my collection

I had spend a day tidy up all my US postcards.
There are 50 states in US.
As at today, I only have 24 states in my postcard collection.

Those are my outstanding US states,

1) Georgia
2) Alabama
3) Idaho
4) Illinois
5) Indiana
6) Iowa
7) Kansas
8) Kentucky
9) Louisiana
10) Colordo
11) Connecticut
12) New Jersey
13) New Mexico
14) Mississippi
15) Missouri
16) Montana
17) Nebraska
18) Rhode Island
19) South Carolina
20) North Dakota
21) Tennessee
22) West Virginia
23) Wyoming
24) Vermont
25) Utah
26) Delaware

Kindly help me to complete my collection of 50 US States.

Thank you.