Princess Tatiana Konstantinovna of Russia (Russian: ?????? ??????? ?????????????; 23 January 1890 – 28 August 1979) was the third child and oldest daughter of Grand Duke Konstantin Konstantinovich of Russia and wife, Princess Elisabeth of Saxe-Altenburg.
Princess Tatiana Konstantinovna (not to be confused with her cousin, Grand Duchess Tatiana Nikolayevna, second daughter of Nicholas II, 1897–1918), had six brothers and two sisters, one which died at the age of two months.