Rent in Portland is higher than average. But so is income June 22, 2017Economyincome, personal income, purchasing power, U.S. Bureau of Economic Analysis By Darren Fishell Renters around Portland have been paying about 10 percent more than the national average as Bangor and Lewiston renters saw prices drop through 2015. But that doesn’t make up for generally lower income around Bangor and Lewiston.