There has been an increasing trend in online dating companies, to make it as easy as possible from a user perspective, to find someone in your local area. This is done by the use of IP tracking technology, which is fairly good at locating site visitors to within a 50km radius.
Clever use of this technology has been made by the likes of Adult Friend finder, who go as far as locating local singles for you, and displaying them on a map. Here is an example of what this will look like for you: