Count Anatoly (called Anatole) Pavlovich Demidov, 4th Prince of San Donato (Russian: Анатолий Павлович Демидов; 31 November OS: 12 November 1874 in San Donato – 27 October 1943 in Marseille) of the Demidov industrial family, was the last Prince and member of his house. He succeeded his elder half-brother Elim Pavlovich Demidov, 3rd Prince of San Donato in 1943 but died in exile in the same year without male issue.
In Saint Petersburg on 1 February 1894 he married Evgenia Klimentievna Podmener (Saint Petersburg, 12 December 1871 - Nice, 13 October 1958), who belongs to a wealthy family of the Finnish landowning class (Podmener Estate in Terijoki, Grand Duchy of Finland), by whom he had three daughters:
Princess and Countess Elena Anatolyevna Demidova (Saint Petersburg, 28 August OS: 15 August 1901 - Montreal, 26 June 1970), married in Nice on 29 July 1926 Paul René Geoffroy (Nyons, 2 May 1903 - Montreal, 27 October 1991)
Princess and Countess Evgenia Anatolyevna Demidova (Saint Petersburg, 25 September OS: 12 September 1902 - Cazouls-lès-Béziers, 25 April 1955), married in Nice on 29 September 1927 Jean Gerber (Sevastopol, 2 February 1905 - Geneva, 9 September 1981)
Princess and Countess Aurora Anatolyevna Demidova (Wiesbaden, 11 December 1909 - Marseille, 17 March 1944), married in Marseille on 29 July 1933 Jean Giraud (Marseille, 26 October 1912 - Nice, 5 February 1962)