Sandra Dier

 is a fictional camp counselor and murder victim featured in the Friday the 13th film series. Played by actress Marta Kober, she appeared in the 1981 movie Friday the 13th Part 2.

Overview
Sandra was one of the camp counselors at the Camp Crystal Lake Counselor Training Center in 1984. She was romantically linked to a man named Jeff, and was a close friend of another counselor named Ted.. Sandra and Jeff disobeyed the orders of their employer Paul Holt and ventured into the restricted areas of the camp where Pamela Voorhees had killed several counselors just five years prior. As punishment, Holt had Jeff and Sandra stay behind while the other counselors went into town for a "final night out" before the summer season. That evening, Jason Voorhees murdered both Jeff and Sandra by impaling them with a spear in their room while the two were making love.