Nikiski is a census-designated place (CDP) in Kenai Peninsula Borough, Alaska, United States.

A second road, the Nikiski Emergency Escape Route, also leads south to the City of Kenai.

Nikiski first appeared on the 1880 U.S. Census as the unincorporated Tinneh villages of "Kultuk" (AKA Nikishka No.

[7] There apparently were no census reports from 1880 until 1980, when the area was organized as "Nikishka" and made a census-designated place (CDP).

Nikiski was once home to an Agrium fertilizer plant, which was once the Kenai Peninsula Borough's largest employer.

[9] The facility closed in 2008 due to natural gas shortages, but the company continues to explore reopening it.