Main •
Curious George (vocal effects by
Frank Welker) is a tailless monkey who is the
protagonist of the series. As his name implies, he is excessively curious and often causes lots of unintentional problems. • The Man with the Yellow Hat (voiced by
Jeff Bennett) is a man who first befriended George. He is almost always wearing some form of yellow clothing, and acts as George's fatherly figure, primary teacher and mentor. • Narrator (voiced by
William H. Macy in season 1 and
Rino Romano in seasons 2–15) is an unseen storyteller who narrates the events of each episode of the show. His narrations largely describe about the feelings of George and the Man with the Yellow Hat along with their actions, often serving as an internal monologue for speechless characters such as animals.
Supporting • Chef Pisghetti (voiced by
Jim Cummings) is a chef from
Italy who owns and operates an Italian restaurant in the city with his wife. • Netti (voiced by
Susan Silo) is Chef Pisghetti's wife. • Gnocchi (vocal effects by
Debi Derryberry in seasons 1–3 and "Gnocchi The Critic" and
Dee Bradley Baker in seasons 4–15) is Chef Pisghetti's beige female cat. • The Doorman (voiced by
Bill Chott in season 1 and
Lex Lang in season 2-15) is the doorman for the apartment building in which George and the Man with the Yellow Hat live. He is Hundley's owner. • Hundley (vocal effects by
Bill Chott in season 1 and
Lex Lang in season 2-15) is an orange male
dachshund dog. Hundley is very proper, polite, slightly cynical and gentlemanly. He keeps vigil on the lobby of George's apartment building when his owner, the Doorman, is absent. • Compass (vocal effects by
Rob Paulsen) is a blue male
homing pigeon, also cared for by the Doorman. Compass lacks a sense of direction, therefore often referred to as an "Almost-Homing Pigeon". A
running gag throughout the series shows him unsuccessfully trying to guess what kind of animal George is. • Professor Wiseman (voiced by
Rolonda Watts) is a scientist who is a good friend of George and the Man with the Yellow Hat. In different episodes she is seen to be a
rocket scientist, and is seen to work at a local museum. She has two colleagues named Professor Einstein and Professor Pizza. Her name is a play on the words
wise man. • Steve (voiced by
Elizabeth Daily) and Betsy (voiced by
Grey DeLisle) are siblings from George's neighborhood in the city. They live with their Aunt Margaret and their dog, Charkie. • Charkie (vocal effects by
Kel Mitchell and
Rob Paulsen) is a female black
cocker spaniel dog owned by Steve and Betsy. She is very energetic, extremely fast and chaotic. She often runs after whatever catches her attention, causing Steve and Betsy to chase after her. • Mr. Glass (voiced by
Rob Paulsen, with a vocal impression reminiscent of
Gilbert Gottfried) is a wealthy businessman and good friend of Chef Pisghetti who owns a building known as "The Glass Palace" and hires window washers in the city. He is known to like things that are unique to him. • Jumpy Squirrel (vocal effects by
Jim Cummings) is a male squirrel who lives in the country. • Bill (voiced by
Annie Mumolo) is George's neighbor from across the street in the country who is the town's paperboy. • Bill's Bunnies (vocal effects by
Frank Welker) are seven baby
bunnies owned by Bill. Their names are Fuzzy, Whitey, Brownie, Spotty, Black Ears, Cotton Tail, and Herbert Nenninger. He also owns their mother (Ma Rabbit), whose burrowing abilities are highlighted in several episodes. • Mr. & Mrs. Renkins (respectively voiced by
Jeff Bennett and
Kath Soucie) are a couple who own and operate a farm near the country house. • Allie (voiced by
Lara Jill Miller) is the 5-year-old granddaughter of the Renkins, who is first introduced in
George Meets Allie-Whoops! where she and George quickly form a close friendship. • Mr. Zoobel (voiced by
Carlos Alazraqui) is George's upstairs neighbor in the city, and a painter of modern art. He often uses large, heavy rubber stamps that resemble animal feet in his art, which made George think there was an elephant upstairs. He also has several pet animals, including a snake, an elephant, and two mice. • Marco (voiced by
Grey DeLisle) is a
Mexican boy who lives in The Puerto Del Sol district, a predominantly
Latino neighborhood in the city. He performs with his family's
Latin band around the city. • The Quints (male Quints voiced by
Jim Cummings and female Quints voiced by
Candi Milo): Clint Quint is one of George and The Man With The Yellow Hat's country friends, a retired fisherman and one of a set of
quintuplets. His siblings are two sisters,
track runner Sprint and mint operator Mint, and two brothers,
train-station master Flint, and the country town's
police chief, Wint.
Minor • Dinwoodie (voiced by
Jess Harnell) • Jagger (vocal effects by
Rob Paulsen) is a rooster who's very protective of those hens in the hen yard. • Hamilton (vocal effects by
Rob Paulsen) is a male pig. • Dumpling (vocal effects by
Frank Welker) is a male duck. • Dottie (vocal effects by
Jeff Bennett) is a female deer. ==Voice cast==