PORTLAND — Maine’s primaries are less than a month away, but many Mainers still don’t know who’s running for governor.

Critical Insights said today that 30 percent named Republican candidate Les Otten in a poll asking if they could name a candidate. Sixteen percent named Republican Peter Mills and Democrat Libby Mitchell, and 11 percent named Democrat Steve Rowe.

It was single digits for the rest: Democrats Pat McGowan and Rosa Scarcell and Republicans Steve Abbott, Bruce Poliquin, Paul LePage, Matt Jacobson and Bill Beardsley.

Forty-two percent couldn’t name any candidate.

The poll surveyed 600 likely primary voters between April 28 and May 7, before the Republican Convention. The poll has a margin of error of plus or minus 4 percentage points.