According to the United States Census Bureau, the city has a total area of 67.5 km² (26.0 mi²). 58.7 km² (22.7 mi²) of it is land and 8.8 km² (3.4 mi²) of it is water. The total area is 12.98% water.

There are 15,096 households out of which 30.2% have children under the age of 18 living with them, 38.4% are married couples living together, 13.3% have a female householder with no husband present, and 43.9% are non-families. 35.4% of all households are made up of individuals and 11.9% have someone living alone who is 65 years of age or older. The average household size is 2.30 and the average family size is 2.98.

In the city the population is spread out with 24.5% under the age of 18, 15.5% from 18 to 24, 30.3% from 25 to 44, 17.2% from 45 to 64, and 12.5% who are 65 years of age or older. The median age is 31 years. For every 100 females there are 103.7 males. For every 100 females age 18 and over, there are 103.7 males.

The median income for a household in the city is $30,950, and the median income for a family is $36,358. Males have a median income of $28,320 versus $23,523 for females. The per capita income for the city is $16,724. 19.4% of the population and 16.0% of families are below the poverty line. Out of the total people living in poverty, 25.7% are under the age of 18 and 11.4% are 65 or older.

There is a strong Navy presence in Bremerton, as it is home to the Puget Sound Naval Shipyard.

Bremerton is connected to Downtown Seattle by a 50-minute ferry ride, which carries both vehicles and walk-on passengers