3 Portland institutions with verified free admission. Portland is honest-but-thin on free days: the Art Museum runs a first-Thursday free day and OMSI publishes $5 discount dates, while the Oregon Zoo — despite a persistent internet myth about free second Tuesdays — has no free day at all, only seasonal discount days.
| Institution | Free day | Who qualifies | Reservation |
|---|---|---|---|
| OMSI (Oregon Museum of Science and Industry) | No regular free day | Everyone | Required |
| Oregon Zoo | No regular free day | Discounts: Oregon/Washington income-assistance participants | See page |
| Portland Art Museum | 1st Thursday monthly 10am–7pm | Everyone | Required |
The 1 paid institution we track in Portland charges $24.50 in adult admission. On the free calendar the same visits cost nothing — up to $49 kept for a couple, $98 for four. None of these free routes are resident-gated, so the math holds for visitors as well as locals. For scale: across the 37 cities on this site the median tracked roster is 4 institutions, which makes Portland's 3 a leaner roster where timing each visit matters more. A short roster also shifts the weight onto the calendar-free routes below — Museums on Us weekends and Museums for All do proportionally more work in Portland than in cities with a dozen free days to choose from.
Bank of America's Museums on Us program opens participating Portland institutions to cardholders free on the first full weekend of every month — in Portland that includes OMSI (Oregon Museum of Science and Industry), Portland Art Museum. And through Museums for All, a SNAP EBT card admits up to four people for free-to-$5 on any regular day.
Count 7 Portland-area names on the Museums for All participant list — show a SNAP EBT card plus photo ID and up to four people get in for free-to-$5, on any normal operating day: Oregon Historical Society · Architectural Heritage Center · Lan Su Chinese Garden · Japanese American Museum of Oregon · Oregon Jewish Museum and Center for Holocaust Education · Hellenic-American Cultural Center & Museum of Oregon and SW Washington and 1 more. Mechanics, exclusions and the searchable national roster are on our Museums for All guide.
Before paying admission anywhere in Portland, check the reciprocity lookup: NARM, ASTC and AZA agreements frequently honor out-of-town memberships here.
One short email a month with Portland's verified free days — the dates, the resident rules, nothing else.
↥ Check another museum → Browse all free museum & zoo days →
None of the Portland institutions we track are free every day, but 3 run regular free days — see the table above.
Some do. OMSI (Oregon Museum of Science and Industry) and Portland Art Museum require advance free tickets; each institution's page here says exactly how it works and links the official booking page.