Valdemārs is a Latvian masculine given name and surname and may refer to:

Given name Valdemārs Baumanis (1905–1992), Latvian basketball player, basketball and football coach Valdemārs Klētnieks (1905–1968), Latvian writer and national Scout Commissioner for Latvia before World War II Valdemārs Ozoliņš (1896–1973), Latvian composer and conductor

Surname Krišjānis Valdemārs (1825–1891), Latvian writer, editor, educator, politician, lexicographer, folklorist, and economist Krišjānis Valdemārs, a Latvian icebreaker of the Ministry of Trade and Industry of the Republic of Latvia from 1926 to 1941

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