Kitsap County is connected to the eastern shore of Puget Sound by Washington State Ferries routes, including the Seattle-Bremerton Ferry, Southworth to West Seattle via Vashon Island, Bainbridge Island to Downtown Seattle, and from Kingston to Edmonds, Washington.

On the understanding that they would "bring home a new county," area mill operators George Meigs and William Renton supported the candidacies to the Territorial Legislature of two employees from their respective mills: Timothy Duane Hinckley from Meigs' and S.B.

Upon arrival in Olympia, the two men introduced bills to create a new county, to be named "Madison".

Bremerton, the site of the Puget Sound Naval Shipyard, peaked at 80,000 residents during World War II.

According to Puget Sound Partnership, Kitsap county has over 250 miles (400 km) of saltwater shoreline.

In the 2016 U.S. presidential election, Democrat Hillary Clinton received 49.0% of the vote to Republican Donald Trump's 38.1%.

[21] On mainland Kitsap County, politics are strongly influenced by working-class Bremerton, which casts moderate margins for Democratic candidates.

County area political trends can be tracked by analyzing the election precinct data.

[22] Bainbridge Island, East Bremerton, Poulsbo and Silverdale Bremerton, Gig Harbor and Port Orchard Bremerton, Shelton and Mason County Kitsap County is connected to the eastern shore of Puget Sound by several Washington State Ferries routes, including the Seattle-Bremerton Ferry, Southworth to West Seattle via Vashon Island, Bainbridge Island to Downtown Seattle, and from Kingston to Edmonds, Washington.

The agency launched its fast ferry services to Seattle in July 2017, beginning initially with a Bremerton route and later expanding to Kingston in 2018.

At the Bremerton Junction near Gorst a spur follows Highway 3 along the shore of the Sinclair Inlet terminating at the Puget Sound Naval Ship Yard, the other follows Highway 3 along the western shore of Dyes Inlet, servicing Bangor Naval Submarine Base.

The Navy had originally intended to use armored trains to transport nuclear missiles to Bangor for the Trident submarines but protesters and a series of court decisions derailed the plan.

[33] Walking Tall with The Rock and Johnny Knoxville was based in Kitsap County, and the City of Port Orchard is the basis for the fictional community of Cedar Cove in the books by Debbie Macomber.