At the 2000 census, there were 72,259 people, 30,226 households and 17,863 families residing in the city. The population density was 6,693.4 per square mile (2,583.3/km²). There were 31,644 housing units at an average density of 2,931.2/sq mi (1,131.3/km²). The racial makeup of the city was 56.95% White, 6.21% Black or African American, 0.67% Native American, 26.15% Asian, 0.60% Pacific Islander, 3.29% from other races, and 6.13% from two or more races. 9.31% of the population were Hispanic or Latino of any race.
There were 30,226 households of which 27.7% had children under the age of 18 living with them. 43.7% were married couples living together, 11.4% had a female householder with no husband present, and 40.9% were non-families. 32.2% of all households were made up of individuals and 9.4% had someone living alone who was 65 years of age or older. The average household size was 2.35 and the average family size was 3.04.
Age distribution was 21.5% under the age of 18, 7.0% from 18 to 24, 33.6% from 25 to 44, 24.6% from 45 to 64, and 13.3% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 92.3 males. For every 100 females age 18 and over, there were 89.5 males.
The median household income was $56,285, and the median family income was $68,625 (these figures had risen to $71,262 and $88,458 respectively as of a 2007 estimate). Males had a median income of $49,174 versus $40,165 for females. The per capita income for the city was $30,982. About 6.0% of families and 8.2% of the population were below the poverty line, including 11.4% of those under age 18 and 6.1% of those age 65 or over.
There is a major Portuguese community, from where Tom Hanks' mother came and where Lyndsy Fonseca was raised for some time.
Vehicle access to the island is via three bridges to Oakland, a bridge for vehicular traffic as well as a second, pedestrian/bicycle-only drawbridge (the only one in the USA), to Bay Farm Island, and two one-way tunnels leading into Oakland's Chinatown. Bridges at Fruitvale Avenue, High Street, and Park Street, and the tunnels at Webster Street and Harrison Street (the latter called the Posey Tube) connect Alameda and Oakland. Public transportation includes the AC Transit buses (which include express buses to San Francisco) and two ferry services — the Alameda-Oakland Ferry and the Harbor Bay Ferry. Both ferry services may soon be transferred to the Water Transit Authority. The island is also close to the BART train service, with the closest stations being Lake Merritt, near the exit to the Posey Tube, and Fruitvale, near the Fruitvale Bridge.
Even though the island is just minutes off Interstate 880, the speed limit for the city is 25 mph (40 km/h) on almost every road. Many unaware drivers fail to slow down after exiting the highway. Groups like Pedestrian Friendly Alameda and BikeAlameda advocate stronger enforcement of speeding laws. Alameda has a reputation for vigorous enforcement of the 25 mph (40 km/h) speed limit.