[1] The Tulalip Indian Reservation was established by the Treaty of Point Elliot in 1855 and by Executive Order of US President Ulysses S. Grant on January 22, 1873.

[citation needed] A 2,000-acre (810 ha) section of the reservation was home to a federal ammunition depot established during World War II and later used by Boeing for chemical weapons testing and storage.

To accommodate a growing population, in 2008 it opened three new schools, built of prefabricated, modular units that operate and look like traditional construction, at its site on the reservation.

The company agreed to develop 100 to 120 stores on 47 acres of land near the tribe's casino and the Quil Ceda Business Park.

In August 2011, the tribe opened the 23,000 square feet (2,100 m2) Hibulb Cultural Center and Natural History Preserve on the reservation.

[18] The center includes museum exhibits of Tulalip history and artifacts, classrooms, an archaeological repository, a longhouse, and research library.

The tribe is governed by a seven-member, democratically elected Board of Directors, whose members fill designated roles as officers.

The tribe began development of a major shopping and business center along Interstate 5 in the 1990s, aiming to attract the auxiliary support facility of Naval Station Everett as its main tenant, but an agreement broke down.

[27] The 800-acre (320 ha) center, named Quil Ceda Village, was built in the early 2000s alongside a new casino and outlet mall.

[33] The Tulalip Tribes owns a disused railroad bridge over Interstate 5 at the north end of Quil Ceda Village that had been used by Boeing for access to its engine test site on the reservation.

The tribe has long-term plans to use the bridge for a multi-use pedestrian and bicycling trail that would connect to a proposed Amtrak Cascades station in Marysville.

In November 2002, John McCoy, a longtime Tulalip leader, was elected to the Washington state legislature, where he first served as the only Native American member.

[35] The tribes host numerous annual events, including Treaty Days, typically in January to commemorate the signing of the Point Elliot Treaty on January 22, 1855; First King Salmon Ceremony, to bless the fishermen and celebrate catching the first king salmon of the season; Winter Dancing; and a Veteran's Pow Wow during the first weekend of every June.