The conservative student group Young American's Foundation had originally invited Coulter to Berkeley to be part of their campus lecture program on Thursday.
YAF blamed the cancellation on the failures of campus officials to properly secure the University as well as meet equal access standards for right-wing speakers.
"Berkeley made it impossible to hold a lecture due to the lack of assurances for protections from foreseeable violence from unrestrained leftist agitators," stated YAF on Tuesday.
"Ms. Coulter may still choose to speak in some form on campus, but Young America's Foundation will not jeopardize the safety of its staff or students."
YAF is pursuing legal action against Berkeley, noting in its statement that it "is pressing forward with its lawsuit against UC-Berkeley, and looks forward to the day when First Amendment freedoms are enjoyed by conservative students."