This question already has an answer here:
The way to earn 'Civic Duty'
badge is to have Voted 300 or more times. Is there any way to find how many votes I have already made?
The section Shree references shows the votes you placed on each individual question and answer, which arguably may not be that helpful if you're trying to figure out how far you are from the Civic Duty badge. If you want to just see the totals, just look for a panel that looks like this at the bottom right section of your user profile, as suggested by Jamal:
You can also see the total votes cast by any user by looking at the bottom right section of his or her user profile.
Better option is just go to any review page. There you can see the Civic Duty badge progress bar by hovering on the green progress bar.