Z Plan

Z Plan or Plan Z may refer to:

Military and political plans

 * Hypothesis Z, sometimes called Plan Z, the first Romanian plan for World War I
 * Plan Z, a plan for re-equipment and expansion of the Nazi German Navy ordered by Adolf Hitler in 1939
 * Operation Z, the Japanese code name for the 1941 Attack on Pearl Harbor in its planning stages
 * Operation Z (1944), the initial Japanese plan for the defense of the Marianas Islands in WWII
 * Z-4 Plan, a proposal to settle the Croatian War of Independence

Other

 * Plan Z (TV series), a 1990s Chilean TV series
 * Plan Z, a major plot element in The SpongeBob SquarePants Movie
 * Z-plan castle, a form of castle design common in England and Scotland