5-26 Dotplot map
A scatterplot, where the x- and y-axes are geographical (or a list of geographical points); additional dimensions for size, color, or shape. Dots are located at the centroid of each zip code; the first digit encodes color.
This is Figure 5-26 from the book, Making Data Visual by Danyel Fisher and Miriah Meyer, O'Reilly Press, 2018.