Oberdieck, Bernhard — Portfolio of children's book and advertising illustrations. Content is available in English and Dutch.

O'Leary, Erin — Children's acrylic and watercolor illustration.

Ortakales, Denise — A gallery of the artist's paper sculpture illustrations that have appeared in magazines, journals, and children's books. Also includes a directory of women children's book illustrators.

Overman, Emma — Children's illustrator and muralist.

Palacios, John — Portfolio of acrylic, watercolor, black-and-white, and color illustrations for children's books, posters, and educational materials. Includes image index by topic.

Patience, John — Watercolor, pen and ink illustrations of fairy-tale animals and other characters for print.

Peng, Cathy — Playful illustrations for books, greeting cards, and magazines. Includes artist biography, sketchbook, and contact information.

Penney, Ian — Exhibiting published watercolor illustrations for children's books.

Perruzzi, Diane — Sacramento artist specializing in children's book illustration and murals.

Peterson, Katie — Children's illustration in watercolor and gouache.

Phipps, Renee — A variety of original art works author and illustrator of children's books.

Pollema-Cahill, Phyllis — A portfolio of illustrations for children's publishing.

Quay, Emma — Children's book illustrator and author. Site include artist biography, book information, portfolio samples, and activities.

Radunsky, Vladimir — Home page and samples of books by the children's illustrator.

Ramá, Sue — Contemporary watercolor illustration for children's books, greeting cards, inspirational and editorial use, and giclee prints.