non-partisan

adjective

1. not partisan; objective.
2. not supporting or controlled by a political party, special interest group, or the like.

noun

3. a person who is nonpartisan.

adjective

1. not partisan or aligned, esp not affiliated to, influenced by, or supporting any one political party

adj.also nonpartisan, 1872, American English, from non- + partisan. FIRST POLITICIAN: Who’s backing this non-partisan candidate?SECOND POLITICIAN: The non-partisan party.[“Life,” Sept. 29, 1927] As a noun from 1888.