OK, you are dying to start figuring out where you want Utah's congressional districts or Utah Senate or House districts boundaries to go, but you don't have the software yet and just want to start with real numbers. You can go to the Census Website or start with some basic numbers found here:
US 2010 Census numbers downloaded from their website:
Utah Senate and House District Populations - 2010 Census based on boundaries not adjusted by SB113.
City and Town Populations:
Just for fun idea based on the above numbers:
A proposed map of the 4 Congressional districts. (approx. - not official, just my idea)
The numbers backing up the above concept map: