Seattle passed a measure Tuesday to extend civil rights protections to non-monogamous people and multigenerational households, and recognize additional sexual orientations and gender identities as protected classes under local law. The city council voted unanimously in favor of the bill.
As the largest city yet to pass such a law, Seattle joins a growing group of local governments acknowledging non-monogamous and polyamorous people as frequent subjects of housing and workplace discrimination, and in need of commensurate protection. Boston suburbs Cambridge and Somerville, and Berkeley and Oakland in California’s Bay Area, have previously passed similar policies; Seattle is the 10th city to do so. Advocates say the efforts help local governments serve the many family structures that actually exist, not just the ones that are easy to define.
Research cited by the city council suggests that 10-20% of North Americans have engaged in consensual non-monogamy during their lives, while 5% are currently non-monogamous. More than 50% of respondents to a 2018 academic survey reported experiencing discrimination due to their consensual non-monogamous practices, including in medical settings, workplaces and family court.
Local advocate Jessa Davis helped spearhead the grassroots movement to enact a bill in Seattle after her partner experienced job discrimination in August 2024 due to her non-monogamy. Davis said the experience exposed which forms of discrimination were still “not illegal” in Seattle, even as targeting her partner “based on her sexual orientation or her gender identity or political ideology” would have been “covered in Seattle”.
Following engagement with advocates, Seattle’s Human Rights Commission penned an open letter in December 2025 in favor of a bill to address discrimination “on the basis of family and relationship structure” and to close “loopholes that currently allow exclusion, harassment, and denial of opportunity to persist unchecked”.
Council member Alexis Mercedes Rinck, who sponsored the bill, said this most recent “update to code” is part of a “decades-long process” to recognize protected classes with “a degree of inclusivity”. In the 1970s, Seattle residents were the first in the US to vote in favor of legal protections for LGBTQ+ people; more recently, in 2023, Seattle was the first US city to ban caste-based discrimination. Updating anti-discrimination statutes to include other family structures and sexual orientations helps the law “reflect how our neighbors define themselves and define their families”, Rinck said.
In Portland, Oregon, which passed a similar law in March, some lawmakers expressed concern that the measure could attract unwanted attention from rightwing groups. Adding legal protections for non-monogamous people shouldn’t be “a red-versus-blue culture war issue”, Davis claimed, adding that “lots of people, even people who vote for Donald Trump … are in our community”. Davis also said expanding civil rights protections benefits a broader population than those explicitly named in the laws, and can push back against growing conservative efforts to curtail the legal rights of minorities.
“If we’re not expanding the circle of protections, we are leaving ground for people who aren’t being quiet about the fact that they are coming for marriage equality next,” she said. Republican-led governments in several states have recently declared June, traditionally pride month in celebration of LGBTQ+ rights, to be “nuclear family month”, which shows “their intention to roll back a lot of progress that we’ve made in the last 10 to 15 years”, Davis suggested.
The Seattle law will go into effect on 1 June 2027. In addition to housing and employment protections, the new measure also entitles protected classes to bias-free encounters with police. Rinck, advocates and the Human Rights Commission are interested in evaluating and improving how Seattle’s anti-discrimination laws are enforced.
“Seattle has a proud history of advancing civil rights protections, but I think those protections only matter when people can actually access them, and there’s a pathway for enforcement of them,” said Phil Lewis, a member of the Human Rights Commission.
Davis has recently joined the Organization for Polyamory and Ethical Non-monogamy (Open), a nationally focused legal advocacy group, as its executive director. In Seattle, passing an anti-discrimination law can help more non-monogamous people speak up and shape policy without fear of retribution, she said. Advocates are working on similar measures in other large cities, Davis added, including Baltimore, Denver, Los Angeles and San Francisco.
