I have found the site “findagrave.com” to be a useful tool. On this site are cemeteries listed for all over the world; all is needed is the country, state, and county if known. A list of cemeteries is displayed for this particular county.
At this point one can either “click” on the cemetery name or the “number of burials” in this cemetery. And then you can begin your search of the name you wish to find. Sometimes there are pictures of the headstones displayed on the site with dates. See the history of Jens Christensen; the pictures of the headstones are from this site.