Amboy CDP, Washington (data.census.gov) Amboy CDP, Washington is a city, town, place equivalent, or township located in Washington. Amboy CDP, Washington has a land area of 10.0 square miles.
Amboy: When A.M. Ball circulated a petition asking for a post office in 1886, he was given the honor of naming the town. There are three versions of how he made his choice. One version is that there were several settlers with the initials A.M.B., among them Ball himself as well as A.M. Browning and A.M. Blaker, who were called the A.M. Boys.