Donna Martin is a fictional character from the Beverly Hills, 90210 franchise, introduced in Beverly Hills, 90210 and portrayed by Tori Spelling from 1990 to 2000. In 2009, Spelling reprised the role in the spin-off 90210.

Donna was introduced in the first season as Kelly Taylor's best friend. For the early part of the first season, the Donna character was a supporting role, but gradually became a main character with her own storylines. Donna grew up in a very wealthy Beverly Hills household, the only child of Dr. John Martin, a successful physician and her mother Felice Martin, a socialite. Donna grew up as a strict Catholic, and her mother's strict rules on morality would be a running storyline for much of the show. Because of this, Donna by choice remained a virgin for much of the show's run, until she was well into college.

In high school, Donna discovered she had dyslexia and struggled at exams. She also almost failed to graduate after she was caught drinking alcohol at the senior prom. This led to a student demonstration to support her, and the slogan of her classmates.