Portland is 30% more expensive than Manchester.
When comparing Portland, OR and Manchester, NH, the overall cost of living indices are 138 and 106 respectively (national median = 100). Rent is $131/month cheaper in Manchester, saving renters about $1,572/year.
Median household income is $11,377/year higher in Portland. Home values also differ significantly — the median in Portland is $557,600 compared to $336,300 in Manchester.
New Hampshire has no state income tax, giving Manchester residents a significant tax advantage over Oregon's 9.9% rate.
Portland vs Manchester — common questions
Other cost of living comparisons for Portland and Manchester