Possible, yes, the INDIRECT function would probably be the best
approach. But a LOT of INDIRECT functions can affect sheet performance.
How many did you have in mind?
Also, you give no examples or post no workbook sample so we can see HOW
you would want these VLOOKUPs with corresponding sheetnames to work?
What info are you pulling from one sheet to the next? What criteria? How
will the sheetname be of assistance.
Also, saying that US1 and US2 are the same format, I agree. But adding
CA1 as the next example and I say they are no longer the same. That's
just me.