McNeil Island, a roughly seven-square-mile island in south Puget Sound, is used today for two things: Washington’s Special Commitment Center, a secure facility for people civilly committed as sexually violent predators, and a wildlife preserve that covers most of the island. The federal penitentiary closed decades ago, the state prison that replaced it shut down in 2011, and the public is not allowed to visit.
The Special Commitment Center
The island’s main active use is the Special Commitment Center, operated by the Washington State Department of Social and Health Services. The SCC holds people who have finished their criminal sentences but have been civilly committed by a court because they meet the state’s legal definition of a sexually violent predator.1Washington State Department of Social and Health Services. Special Commitment Center As of mid-2025, about 124 people were held there.2The Spokesman-Review. Sex Offense Treatment Limited at McNeil Island Detention Center
Under Washington law, a person qualifies for this kind of commitment if they have been convicted of or charged with a crime of sexual violence and suffer from a mental abnormality or personality disorder that makes them likely to commit predatory sexual violence unless kept in a secure facility.3Washington State Legislature. Chapter 71.09 RCW – Sexually Violent Predators The commitment is civil rather than criminal, and DSHS treats the SCC as a treatment program, not a prison. There are no plans to close the total confinement facility.4Washington State Department of Social and Health Services (DSHS). Special Commitment Center Frequently Asked Questions
Treatment and How Residents Can Leave
Residents move through a phased sex offender treatment program built around cognitive behavioral techniques that target the risk factors tied to their commitment, including deviant sexual interests and antisocial thinking. They also receive psychiatric care, substance abuse treatment, and educational and vocational services.1Washington State Department of Social and Health Services. Special Commitment Center Most people spend several years at the facility before any transition becomes possible.4Washington State Department of Social and Health Services (DSHS). Special Commitment Center Frequently Asked Questions
Every committed person is entitled to a yearly evaluation. The department looks at whether the person still meets the sexually violent predator definition, whether conditional release would be in their best interest, and whether the community can be adequately protected under release conditions.3Washington State Legislature. Chapter 71.09 RCW – Sexually Violent Predators
Less Restrictive Alternatives
When a court decides a resident is ready, the person may be released to what Washington calls a Less Restrictive Alternative, or LRA. This is not freedom. It is court-ordered treatment in a supervised setting off the island, either in a secure community transition facility or an approved community housing placement.5Washington State Department of Social and Health Services. Less Restrictive Alternative The state operates two secure community transition facilities: one on McNeil Island and one in Seattle’s SODO district.4Washington State Department of Social and Health Services (DSHS). Special Commitment Center Frequently Asked Questions
Supervision on an LRA is much tighter than what a typical registered sex offender faces. Conditions include:
- GPS ankle monitoring around the clock.
- Weekly in-person reporting to a Department of Corrections community corrections specialist.
- Pre-approved travel, with routes tracked by GPS in real time and destinations surveyed by the DOC in advance.
- Continued active participation in sex offender treatment with a court-appointed certified provider.
- Strict curfews, and in many cases a requirement that an approved monitoring adult accompany the person outside their residence.
A court reviews each LRA placement at least once a year and can change conditions or revoke the release.3Washington State Legislature. Chapter 71.09 RCW – Sexually Violent Predators
A Wildlife Preserve on Most of the Island
The SCC occupies only a small part of McNeil Island. About 3,119 acres, roughly 70 percent of the land, are managed by the Washington State Department of Fish and Wildlife as a wildlife preserve.6Washington State Department of Corrections. McNeil Island History Because the island has been off-limits to the public for well over a century, its ecosystems are far less disturbed than those on the surrounding mainland.
The island supports a great blue heron rookery, several bald eagle nests, and haul-out sites for harbor seals. The surrounding waters are habitat for forage fish and migrating salmon.7Washington Department of Fish and Wildlife. South Puget Sound Wildlife Area Management Plan The wildlife area also takes in the nearby Gertrude and Pitt Islands. Shoreline restoration work has been underway in phases, removing concrete armoring, creosote pilings, a wood bulkhead, metal debris, and old submarine torpedo nets left over from earlier eras of the island’s use.8Washington State Department of Natural Resources. McNeil Island Shoreline Restoration
You Cannot Visit
Public access to McNeil Island is closed. Both the secure commitment facility and the federal deed conditions on the wildlife preserve prohibit general visitation. The only people who regularly travel to the island are SCC staff, Department of Corrections employees handling island maintenance, and other authorized state personnel. Transportation runs on a state-operated ferry from Steilacoom, managed by the DOC, which also handles wastewater and water treatment, road maintenance, and general upkeep required under the federal deed.6Washington State Department of Corrections. McNeil Island History