I have been fortunate to receive a lot of wonderful family information from other researchers on our mutual families. As I add this new data to my genealogy software program, I frequently come across locations given only as a town and state - no county. Within seconds, I receive listings on the search term. And much more than a county identification is given.
Many searches also turn up cemetery listings.
All items include latitude and longitude, a great help in locating them on maps. This is a very popular site and sometimes is unavailable. Here you can type in a town and state and quickly find the county the in which the town is located. If you have only a town name and not a state, you will be furnished a list of towns throughout the United States. When I am inputting new information into my Family Tree Maker, I often keep one of these sites minimized so I can flip to it quickly and get the county names I need.