Milla-Kariina Oja (b.1976) is a Finnish artist who is currently based in Helsinki. Her work moves on the borders of photography and video, often including some performative qualities. Ones individual space, home and boundaries have been at the center of her interests in recent years.

She graduated with BA (Hons) Fine Art Photography from Manchester Metropolitan University in 1999, continuing her studies in a Fine Art PhD program in 2000-2002 at the University of Barcelona, Spain, where she lived and worked until she moved to China in 2006.

Her work has been widely exhibited in galleries, art centers and museums in Europe and China. Her solo show, Home-Project, was shown in 2010 at one of China's most prominent platforms for contemporary photography and video art, The Three Shadows Photography Art Centre in Beijing and also as a part of the Special Projects -Foreign artists in China platform at the Art Beijing Contemporary art fair in 2010.

Other exhibitions include MK2 Gallery (Beijing), Galleria Ferran Cano (Barcelona), Photography Gallery Hippolyte (Helsinki), Oulu Museum of Art (Oulu, Finland), Lahti Museum of Art (Lahti, Finland) and Lianzhou International Art Photography Festival, (Lianzhou, China), amongst others. She was also selected as one of the artists for the Turku Biennial 2015 at the Museum of History and Contemporary Art, Aboa Vetus & Ars Nova (Turku, Finland).