YORK COUNTY is located in western New Brunswick sharing its western border with the State of Maine, USA as you can see in the map below. You may find the neighboring counties in both countries useful in your research by simply clicking on the neighboring county. Although Aroostook and Washington counties in Maine are not labeled as such, clicking to the Southwest or Northwest in Maine will produce the same results.
(The rest of the counties in New Brunswick are not hyperlinked on this map.)