Oommen, Suzanne
- Portraits, figurative works, abstracts, and other paintings, photographs, and graphic design by artist originally from India, now living in Toronto, and available for commissions.
- http://www.zoommen.com

O'Herron, Chris
- Almost Home Studio - Portraits in oil or charcoal as well as landscapes and other paintings by Connecticut artist and illustrator available for commissions and offering originals and prints.
- http://www.almosthomestudio.com

O'Neill, Linda
- Gallery of dog paintings, digital art and still life oil pastels. Includes artist biography. Cards and limited edition prints are available.
- http://www.abbycreekstudios.com/

Owens, Matthew
- Photo-realistic animal portraits, as of cats, dogs, and other pets, as well as trompe-l'oeil murals, sculpture, puppets, and theatrical props and prosthetics by Chicago, Illinois artist available for commissions.
- http://www.owensartwork.com

Olsen, Mark
- Distinctive portraits in oil based upon the "love for expressionism, colour and design" of the New Zealand artist, exhibited and collected worldwide.
- http://www.markolsen-artist.com

O'Donnell, Terry
- "Terryart" - Portraits of people and of pets and other animals as well as murals and landscapes, in realistic or surrealistic style, in oil, acrylic, or watercolor, by UK artist available for commissions.
- http://www.terryart.co.uk/

Oakart Fine Art Paintings
- Portraits of people or animals, figurative works, and landscapes, in oil, and acrylics, by UK artists Paul Oakley, Zoe Oakley, and Mary Parsons, available for commissions and offering originals.
- http://www.oakart.co.uk/

Ort, Stanley T.
- "Artmolokai.com" - Portraits, nudes, still lifes, and landscapes in oil, watercolor, pastel, pen, or pencil by Molokai, Hawaii artist, seeking models and also available for commissions.
- http://www.artmolokai.com