The most common reasons were lack of qualified candidates, lack of applicants, low wages or unfavorable working conditions.
Economist Jessica Nelson says these openings are harder to fill now than during the recession.
"A couple years ago employers found they had a lot more employees to chose from. And now that the employment is tightening up, they are not seeing as many applicants and the ones that are applying are not the quality they are trying to attract."
The report found employers were having a harder time filling positions requiring post secondary training, but not a college degree.
Also, smaller employers, those with 2 to 19 employees, had the most difficulty filling positions.