Venice train station to cruise terminal can I walk it?

yes, that's an easy walk.

The cruise terminal is to the right of the train station as your train arrives. You can read all about it here:

http://www.italylogue.com/planning-a-trip/venice-cruise-terminal-where-it-is-how-to-get-there.html

In all probability your ship will use the big terminal near Piazzale Roma. If that is the case, simply turn right when you leave the train station, cross the modern bridge and walk up a slight incline to P. Roma. P. Roma is a big open area with buses and such. Facing the square is a big white building that houses the "people mover". Last time it cost one Euro each but it may have gone up. Take it to the first stop and get off. From there it is a short walk to the cruise ship area. If you have baggage that the ship is going to deliver to your stateroom, look carefully for the drop off point. Last trip it was on the right as you walked, but the signage wasn't very good and some people had to backtrack from the ship to the drop off point. If you are going on a smaller ship it might dock at a terminal on the Giudecca Canal. If so, let us know and will try to figure it out send another set of directions. We've never used that terminal so I just do not know. If you go to bing.com, (or googlemaps.com) and click on maps, and type in Venice Italy, you will find they both have excellent maps. You can zoom in / out, move about, and even get aerial or birds eye views of P. Roma, the people mover, and everything. A great way to get a visual lay of the land before you ever get there.

Let the people mover do the walking for you !!

Thank you all for the great information!

The PeopleMover is now 1.5 euros each way.

You can definitely walk it, though give yourself a bit of extra time because if you can get a rush of people slowing things down. But the views!

Google Maps Streetview now covers almost every nook and cranny of Venice, so you could take that walk virtually now, to see what it's like. (The strapped a Google Camera backpack on a guy and had him wander around the entire city.)