Interactive Map of the Civitavecchia port: as you can see there are 3 parking lots, over 20 docks (the pier 25 and piers from 10 through 13 dedicated to cruise ships), there are 3 infopoints dedicated to tourists. You can easily find the terminals for cruising and ferries. To the left there is the wonderful historic harbor of Civitavecchia.
Map updating. Sorry for the inconvenience