Oiva Kalervo Toikka is a Finnish glass designer.
Oiva Toikka was born in Viipurin maalaiskunta, the rural municipality surrounding then-Finnish Vyborg, now part of Russia. He grew up in a farm and was influenced by the rich history of the area. Oiva Toikka was renowned for his designs for glassware for the Finnish design company Iittala.
Originally trained in ceramics at the University of Art and Design Helsinki, he took up glass design later in life. Some of his best known works are the Kastehelmi and Flora tableware from the 1960s and the Pioni and Krouvi collections from the 1970s.