Roy McKie (usually spelled McKié; October 8, 1921 – January 8, 2015) was an American writer and illustrator of children's books, most notably under the Beginner Books imprint.^[1] He illustrated many books penned by Theodor Seuss Geisel (Dr. Seuss) under the pen name Theo. LeSieg ("Geisel" spelled backwards).^[2]

Books illustrated by McKie (books he wrote himself are marked with *) include:

• The Big Orange Book of Beginner Books by Dr. Seuss - 2015 (with Dr. Seuss, Scott Nash and Michael Frith) (his final work after his death)
• The Big Purple Book of Beginner Books by Helen Palmer, P.D. and Peter Eastman and Michael Frith - 2012 (with P.D. and Peter Eastman)
• Skiing by Henry Beard – 2002
• Sailing by Henry Beard – 2001 – dictionary of funny sailing terms
• Computing by Henry Beard – 1999
• The Big Green Book of Beginner Books by Dr. Seuss - 1997 (with Quentin Blake, B. Tobey, George Booth, Michael J. Smollin and James Stevenson)
• A Big Ball of String by Marion Holland – 1993 (35th anniversary edition)
• A Dictionary of Silly Words About Growing Up by Henry Beard — 1988
• Golfing by Henry Beard – 1987 dictionary of funny golfing terms
• Cooking by Henry Beard – 1985 dictionary of funny cooking terms
• Noah's Ark - 1984
• Fishing by Henry Beard – 1983 dictionary of funny fishing terms
• Ship's Log by Henry Beard – 1983 dictionary of funny nautical terms
• Gardening, A Gardeners Dictionary By Henry Beard – 1982 – dictionary of funny gardening terms.
• The Tooth Book by Dr. Seuss (writing as Theo. LeSieg) – 1981 (the 2000 edition replaces McKie's illustrations with new ones by Joe Mathieu)
• The Joke Book* – 1979
• The Hair Book by Graham Tether – 1979 (in 2019, the 40th anniversary edition replaces McKie's illustrations with new ones by Andrew Joyner)
• Dog* – 1978
• The Riddle Book* – 1978
• Roy McKie's Zodiac Book* – 1977
• Would You Rather Be a Bullfrog? by Dr. Seuss (writing as Theo. LeSieg) – 1975
• The Many Mice of Mr. Brice by Dr. Seuss (writing as Theo. LeSieg) - 1973 (the 1989 edition replaces this title with new ones called The Pop-Up Mice of Mr. Brice, and later in early 2015 and early 2021, the 2015 and 2021 editions replace the pop-up book with new board books)
• In a People House by Dr. Seuss (writing as Theo. LeSieg) – 1972
• I Can Write a book by ME, Myself with a little help from Dr. Seuss (writing as Theo. LeSieg) – 1971
• The Nose Book by Al Perkins – 1970 (the 2002 edition replaces McKie's illustrations with new ones by Joe Mathieu)
• My Book About Me by ME, Myself with some little help from my friend Dr. Seuss – 1969
• The Eye Book by Dr. Seuss (writing as Theo. LeSieg) – 1968 (the 1999 edition replaces McKie's illustrations with new ones by Joe Mathieu)
• Bennett Cerf's Book of Animal Riddles by Bennett Cerf – 1964
• Summer by Alice Low – 1963 (2001 recolor edition without banned pages)
• Snow by P. D. Eastman – 1962
• More Riddles by Bennett Cerf – 1961 (the 1999 edition replaces McKie's illustrations with new ones by Debbie Palen part of Riddles and More Riddles!)
• Ten Apples Up on Top by Dr. Seuss (writing as Theo. LeSieg) – 1961 (1998 recolor Bright and Early Board Book edition [with new 2004 recolor Beginner Book pages added],) – Counting book for children
• Bennett Cerf's Book of Riddles by Bennett Cerf – 1960 (the 1999 edition replaces McKie's illustrations with new ones by Debbie Palen part of Riddles and More Riddles!)
• The Greats Family comic books by Roy McKie & Dr. Seuss – 1946 (his first work)
• Mr. Wizard's Supermarket Science by Don Herbert - 1980