 The Mississippi class of battleships comprised two ships which were authorized in the 1903 naval budget : Mississippi and Idaho ; these were named for the 20th and 43rd states , respectively . These were the last predreadnought battleships to be designed for the United States Navy , but not the last to be built , because one more ship of a prior design was built .
 everybody knows that the mississippi class battleships were the last of the predreadnoughts but what about the other two ships that were planned but not built?
I believe that the Idaho class was the last class of battleships to be designed for the US Navy.
