- Airline appearing at Francis International Airport. The name is a reference to DMA Design and Rockstar Games. Also appears in Grand Theft Auto: Vice City.
- Airline advertised in Shoreside Vale. Also appears in GTA Vice City and GTA Liberty City Stories.
- Airline announced in Bedford Point.
- An online pet store advertised on the radio, including on Chatterbox FM.
- Is a dog food producing company in Trenton.
- Autodealership located in Harwood. Also appears in GTA Liberty City Stories.
- A bank with a branch in Chinatown and throughout the city. Also appears in GTA III, GTA Liberty City Stories and Grand Theft Auto IV.
- A bank with a branch in the Red Light District. Also appears in GTA III and GTA Liberty City Stories.
- A bank with a headquarters in Torrington. Also appears in GTA III.
- A bar located in the Red Light District. Also appears in GTA Liberty City Stories.
- A bar located in the Red Light District.
- A bar located in the Red Light District next to the Portland Safehouse. The stores slogan reads "Specialists in Giant Pints".
- A manicure business located in Portland.
- A massage parlour located in the Red Light District, owned by Oily Johnnie.
Pink Pussycat Boutique
- A café in Portland
- A café in the Red Light District.
- A diner located in Callahan Point.
- An internet cafe in Belleville Park. Also appears in GTA IV.
Food and Drink
- Belly-Up Fish & Seafood Processing Plant
- Bolt Burgers
- Carosello Italiano
- Coffee Shop Bar
- Deli & Pizza
- Far East Winerette
- Fat Burger Kid
- Gourmet Deli
- H & W Seafood Co. Inc.
- Happy Blimp
- Hoja Sauce
- Hong Hung Inc.
- Joe's Pizza
- Liberty Bagel Deli
- Live Lobster Crab & Seafoods
- Marco's Bistro
- Market & Deli
- Momma's Restaurante
- Punk Noodles
- Raffles Fish Factory
- Roachway Foods
- Samo's Wok
- Seafood Co. Inc.
- Ting Fu Garden
- Turtle Head Fishing Company
- Uncle BJ's Deli & Groceries
- Yo-Ma's Frozen Fish Products
- 1 Hour Photo
- Sunshine Plumbing Distribution
radio stations that player can use or play in the game:
radio stations that the player can not play:
- East/West Shipping Company USA
- King Storage
- The Box Storage Co.
- The Undercover Storage Company
- Tattoo and Body Piercing Parlour
- Thunco Trading Inc.