Full Cast — Codename: Kids Next Door (2002–2007)

Ben Diskin

Numbuh 1 / Numbuh 2 (voice)

Lauren Tom

Numbuh 3 (voice)

Dee Bradley Baker

Numbuh 4 (voice)

Cree Summer

Numbuh 5 (voice)

Tom Kenny

Counselor / Campers (voice) / Chester (voice) / Fake Delightful Child from Down the Lane (voice) / The Common Cold / Flu Bug (voice) / Knightbrace (voice) / Hoagie Gilligan IV (voice) / Numbuh 42 / Numbuh Ezekiel (voice) / Numbuh 30C (voice) / Chester / President / Robber #1 (voice) +15 more

Jennifer Hale

Numbuh 202 (voice) / Computer / Nerd (voice) / Mrs. Uno (voice) / Stacey (voice) / Computer (voice) / Mrs. Thompson (voice) / (voice) / Mrs. Thompson / Robber #3 (voice) / Dixie / Runt (voice) / Mrs. Beetles (voice) / Secretary / Assistant (voice) / Computer / Rupert's Mom +7 more

Daran Norris

Guards / DJ (voice) / Joe Balooka (voice) / Count Spankulot / Joe Balooka / Spankenstine Monster (voice) / Monty Uno / Count Spankulot / Sargent Sensible (voice) / (voice) / Gooey (voice) / Announcer / Assistant / Homeworko (voice) / Ed / Guard #1 / Lead Mustache (voice) +8 more

Jeff Bennett

Destructo Dad (voice) / Sydney Beetles / Mr. Boss / Technicians (voice) / Hoagie Gilligan Sr. (voice) / Dr. Teef (voice) / Mr. Boss (voice) / Numbuh Jebediah (voice) / Destructo Dad / Mr. Boss / Mr. Fizz (voice) / Sydney Beetles (voice)

Candi Milo

Betty Gilligan / Grandma Lydia (voice) / Leaky Leona / Mrs. Goodwall (voice) / Madame Margaret (voice) / Nurse Jumbo (voice) / Lasso Lass (voice) / Edna Jucation (voice) / Grandma Lydia (voice) / Salmonella Fitzgerald (voice) / Leona (voice) / Henrietta Von Marzipan (voice) / Betty Gilligan (voice)

Jason Harris

(voice) / Marty / Jock (voice) / Chad Dickson (voice) / Commander (voice) / Numbuh 274 (voice)

Frank Welker

Professor XXXL / Defense Array (voice) / Bus Driver (voice) / Rainbow Monkey Kong (voice) / Truck Driver (voice) / Professor XXXL / Chimpy (voice)

Tara Strong

Mushi Sanban (voice) / Rainbow Monkey Tribesgirl #3 (voice) / Mushi Sanban / Stewie (voice) / Pauley Marcus (voice) / Mushi Sanban / Numbuh 93 (voice) / Girls (voice) / Girl (voice) / Sally Sanban (voice)

Grey DeLisle

Mega Mom / Numbuh 69 (voice) / Gramma Stuffum (voice) / Julie / Cheerleader (voice) / Lizzie / Woman (voice) / Laura Limpin / Additional Voices (voice) / Crazy Old Cat Lady / Mega Mom (voice) / Grace / Lizzie Devine (voice) / Lizzie Devine / Laura Limpin (voice)