Craig: the protagonist of the series. An orange Triceratops, Craig is usually very passive and accomodating, but easily gets worried and, on occasion, has gone on destructive rampages. Craig appears to socialize most with Todd, but seems to be on good terms with all his coworkers and even Terry, his boss. Gardening appears to be one of Craig's biggest hobbies, but he also enjoys reading the newspaper. He once created videos of himself juggling and telling jokes, but was remarkably bad at both. Craig is diabetic and lives with his mother, who has yet to have an appearance.
Todd: He is a green Apatosaurus that is Craig's friend and works next to him.
Richard: A red Diplodocus that is a coworker with Craig and Todd. He has orange spots on his back. He first appeared in Dinosaur Office: Computer Problems along with Sheila. Although he and Craig are friends he doesn't hesitate to make fun or embaras Craig on several occations.
Terry: A dark red Tyrannosaurus Rex that is the boss of where Craig and Todd works and likes to eat his workers. He does this to fire people and to satisfy his hunger. Despite this, he is generally on good terms with his employees.
Sheila: A light blue Stegosaurus that is a coworker with Craig and Todd. Sheila has a continuing crush on Craig despite Craig's lack of reciprocation. Along with Richard, she first appears in Computer Problems.
Carl: He is Richard's son and good with computers. He's 13 years old. He's red with yellow spots on his back wears a blue sweatshirt. He was eaten by Terry. He was first seen in Bring your Child to Work Day, & most recently seen in Thanksgiving.
Duncan: He is Todd's son and a yellow egg with red dots on it. He was in the same episodes as Carl. In Thanksgiving he learns how to roll
Gretchen: She is Shela's daughter & wears glasses like her mom. Gretchen has a brother who is a teenager that hasn't been seen in any of the episodes. He was mentioned in Dinosaur Office: Computer Problems. She was first seen in Bring your Kids to Work Day & Thanksgiving.
Waiter: He is a purple Spinosaurus as seen in Dinosaur Office: Guys Night Out.
Car Driver: He is a pink Spinosaurus that wears a blue & white cap on his head. He appears in Traffic.
Secretary: She is a khaki Pteranodon who doesn't talk. She roars instead, but everyone seems to understand those roars.
Intern: He is a small Parasaurolophus who appears in Dinosaur Office: Office Party & Dinosaur Office: Downsizing.
Amelia: An aquamarine and yellow Parasaurolophus that Richard is married to. Craig fell in love with her, but forgot about that crush when Richard told him he was married to Amelia.
Journalist: A light blue female Stegosaurus who reports a news on TV, but then the meteorite hit Dino Corporation.
Skate boarder: A Pteranodon who does stunts and films them. He was killed by one of these when he tried to jump over a volcano - which incinerated him
Danny: An orange and brown Team building Ankylosaurus. He attempted to teach the dinosaurs to work as a team but got angry, jumped on a table and toppled off to be eaten by Terry
Brooms Mckinsey: An orange and brown Janitor Ankylosaurus. His only appearance so far is Dinosaur Office: Halloween Spooktacular, where he tricks Craig into thinking the Printer is haunted. Although he hasn't worked at Dinosoft Limited in 5 years, his employee acsess card is not yet deactivated.
D-Rock: A pink muscular Pachycephalosaurus. He appears in Dinosaur Office:Gym.
Bruce Veloci : An orange & yellow Velociraptor with a brown pelt of feathers on his head. He bought Dinosoft Limited in Dinosaur Office: New Boss pt 1. He also made branmuffin everydays but the workers had to pay for them. Hawaiian T-Shirt day was canceled but Craig thought it was everyday as well. Richard got Terry's job & Terry was fired. In the final part of this episode Terry wore a fake beard & ate The New CEO to saved the company or so he thought.
Season 1 Craig and Todd are in all episodes Sheila and Terry are both absent for three episodes Richard is absent for four episodes
Episode 1: Dinosaur Office Absent:Sheila,Richard
Episode 2: Computer Problems Absent:Terry
Episode 3: Downsizing
Episode 4: Asteroid Absent:Richard,Terry
Episode 5: Traffic Absent:Sheila,Richard
Episode 6: Office Romance Absent:Terry
Episode 7: Volcano Drill Absent:Sheila,Richard
Season 2 Craig is in all episodes Todd is absent for two episodes Shelia and Richard are both absent for three episodes Terry is absent for seven episodes Episode 1: Viral Videos Absent:Terry
Episode 2: Office Party Absent:Todd (first time that Todd is absent for an episode)
Episode 3: Guys Night Out Absent:Sheila,Terry
Episode 4: Bring your Child to Work Day
Episode 5: Elevator Absent:Todd,Richard,Terry
Episode 6: Team Building
Episode 7: Sick Day Absent:Richard Episode 8: Coffee run Absent:Terry (Mostly slow motion and changing of voices)
Episode 9: Gym Absent:Sheila,Richard,Terry
Episode 10: New Boss Part 1
Episode 11: New Boss Part 2 Absent:Sheila (but voiced) Terry
Episode 12: New Boss Part 3
Episode 13: Halloween Spooktacurawr
Episode 14: Thanksgiving
Episode 15: New Years Eve Party
Episode 16 Valentine's Day