California: Sister county[edit] A

Alameda has a sister county: Taoyuan County, Taiwan (now Taoyuan City).^[44]

Communities[edit]

Map of Alameda County, 1878 (Six Townships)

Oakland Township – the northern portion subsequently became the cities of Berkeley and Albany.
Alameda Township – now essentially coterminous with the City of Alameda.
Brooklyn Township – mostly contained within Oakland and Piedmont.
Eden Township – partly incorporated into San Leandro and Hayward, the rest contains the communities of Castro Valley, San Lorenzo, and other unincorporated areas.
Washington Township – contains Union City, Newark, Fremont, and small unincorporated areas nearby.
Murray Township – Contains cities of Dublin, Pleasanton, and Livermore, and substantial unincorporated areas including Sunol.

The population ranking of the following table is based on the 2010 census of Alameda County.^[45]

† county seat

Rank	City/Town/etc.	Municipal type	Population (2010 Census)
1	† Oakland	City	390,724
2	Fremont	City	214,089
3	Hayward	City	144,186
4	Berkeley	City	112,580
5	San Leandro	City	84,950
6	Livermore	City	80,968
7	Alameda	City	73,812
8	Pleasanton	City	70,285
9	Union City	City	69,516
10	Castro Valley	CDP	61,388
11	Dublin	City	46,036
12	Newark	City	42,573
13	San Lorenzo	CDP	23,452
14	Ashland	CDP	21,925
15	Albany	City	18,539
16	Cherryland	CDP	14,728
17	Piedmont	City	10,667
18	Emeryville	City	10,080
19	Fairview	CDP	10,003
20	Sunol	CDP	913

Jump up^ Other = Some other race + Two or more races
Jump up^ Native American = Native Hawaiian or other Pacific Islander + American Indian or Alaska Native
^ Jump up to:^a ^b Percentage of registered voters with respect to total population. Percentages of party members with respect to registered voters follow.