One of the preferences JDate asks you about is “Located Within” a certain number of miles from your city. If you live in a large city then you can likely select “50 miles” and have many prospects to choose from. If you live in a smaller city or town, then you possibly need to expand your mileage to 100 miles. I strongly suggest you do this, even if you live in a rather large city. A friend of mine in Southern California is engaged to a man in Northern California — which seems far, but is just a short flight away. They make it work, most people wouldn’t have even bothered looking so far away.
On the other hand, if you live in a large city and can’t find anyone worthwhile, perhaps your other preferences are too strict? Are your standards too high? Is there something about you that you could work on to better attract the prospects in your mileage range? You can’t always point the finger at what you consider to be poor prospects, sometimes you have to look at yourself first. Then again, after playing Jewish Geography and finding out that you pretty much know everyone in your immediate area, then you shouldn’t hesitate to extend your parameters and perimeters.