Donnelly is married to fellow New Yorker cartoonist Michael Maslin.
Cartoon Marriage: Adventures in Love and Matrimony by The New Yorker's Cartooning Couple (with Michael Maslin), Random House
(January 27, 2009), ISBN 1400068088, ISBN 978-1400068081.
Fathers and Sons: It's a Funny Relationship! (with Michael Maslin), Random House
(May, 1994), ISBN 9780345386762.
Funny Ladies: The New Yorker's Greatest Women Cartoonists And Their Cartoons, Prometheus Books; illustrated edition edition (October 3, 2005), ISBN 1591023440, ISBN 978-1591023449.
Husbands And Wives (with Michael Maslin), Random House
(1995), ISBN 9780345390417.
"Leading Ladies," The New Yorker, Nov. 11, 2002, pp.
They have three sons, Richard, Michael
Michael, a high-school social studies teacher, is the founder of Rivers and Revolutions, a tuition-free interdisciplinary summer program designed to teach highschool students the relationship between literature, history, science, mathematics, philosophy, and the arts.
Michael is currently pursuing a Masters of Education at Harvard University.