Washington State is a location in Kittenville. It has a similar name to Washington, a state in the USA, which is why Kittenville is a Bulgarian place where everyone speaks English.
Washington State first appeared in Ben Kevin's Secret Surprise. This location was revealed to be Talking Angela's home. It later appeared in My Little Kitten: Over Two Smiles when Qubo Logo was bragging about Ni Hao Kai-Lan staying in front of his backyard, but Niki and Plamen both thought it was cute.