Blocking Countries

I have a site that I’ve been working on for awhile now. After looking around on my analystics i found out that my site is visited by a lot of “people” from the Russian Federation. They basically make up 40% of my hits. My employer is worried that they may be trying to hack into the site (Even though no security alerts have gone off) My site is designed for only the people in my local area (its a community center). Is there anyway to block a country through a good plugin? I’ve been thinking about getting an API key for Wordfence and using their Country blocking. But before i spend any money i wanted to makes sure there isn’t another option. So any recommendations?