Jamie Ross was a fictional character on the TV drama Law & Order, created by Rene Balcer and portrayed by Carey Lowell from 1996 to 1998. She also appeared in the short-lived Law & Order spinoff Law & Order: Trial By Jury.

The character was introduced in 1996 (in the episode "Causa Mortis") as a former defense attorney who entered the Manhattan District Attorney's office as an Assistant District Attorney, replacing Claire Kincaid (Jill Hennessy), who had been killed in a car accident in the previous episode ("Aftershock".) She initially had a rocky relationship with Jack McCoy (Sam Waterston), both because he was still mourning Kincaid and because he has a penchant for bending trial rules, which led to personality clashes with her liberal idealism and sense of legal ethics. While the two never saw perfectly eye-to-eye, however, they eventually grew to be close, trusted friends.

During the 1997 season, a bitter custody battle with Ross' ex-husband, Neil Gorton, over their daughter threw her personal and professional life into disarray. For the next year, the brutal litigation against her ex-husband (who was also a lawyer, with whom she used to work) left her with less and less time to devote to her job. She left the DA's office in 1998 (in the episode "Monster") to remarry and find a job that gave her more time to be with her family. She was replaced by Abbie Carmichael (Angie Harmon) in the following episode.

She attended Columbia University Law School.