If you're planning a vacation in the area, you're probably wondering what county Grapeview is located in. To make your vacation planning as easy as possible, you should have a list of all the cities in Washington that are located in this county. If you haven't checked out the map yet, you'll be glad you did. Here are a few things to do in Grapeview. First, consider the weather. The county of Washington is mild, so it is very likely that you'll be in the sun for much of the year.