Yes, that's totally normal when you have WiFi.
Your computer's WiFi adapter has an antenna, just like a radio, and that antenna can detect all the WiFi signals strong enough to reach it, just like a radio antenna. In fact, you can see all the WiFi signals that your WiFi adapter can detect. Just click once on the WiFi icon in the notification area - that's the lower right corner of your screen.
One thing you'll notice if you do this is that most people know enough to password-protect their WiFi signal. But there's always somebody who doesn't, and when somebody doesn't protect their WiFi signal, their network is available to you just like any other device that's on your network, and that's what you're seeing as a network location.