On 27 March 1966, elections for members of the sixth legislative period of the Hamburg Parliament (Hamburgische Bürgerschaft) after the Second World War were held in the German state of Hamburg. There were 1,375,491 eligible voters.
Hamburg state election, 1966 Wikipedia
959,816 voters, meaning a turnout of 69.8%, gave 947,802 valid and 12,014 invalid votes.
Herbert Weichmann continued to be the First Mayor of Hamburg.