Population 2010

1,510,271

Population 2020

1,682,353

Registered Voters

816,942

Republicans

114,802

Democrat

461,007

Minor Party

16,682

No Party

16,417

Municipalities

City Name Population
Alameda75,467
Albany18,960
Berkeley114,961
Dublin49,890
Emeryville10,309
Fremont218,927
Hayward147,424
Livermore82,800
Newark43,539
Oakland399,487
Piedmont10,909
Piedmont71,875
San Leandro86,869
Union City71,089

Superintendent of Schools

Treasurer / Tax Collector

Assessor

County Commission

Brief Political History

Since 1932, Alameda County has been a stronghold of the Democratic Party, with Dwight Eisenhower being the only Republican presidential nominee to have carried the county since. Prior to 1932, the county had been a Republican stronghold. Piedmont resident William F. Knowland was the Republican U.S. Senate Leader from 1953 to 1959. Even when Ronald Reagan won the national popular vote by an 18.3% margin in 1984, Walter Mondale won Alameda County by a larger margin. In 2004 it voted for John Kerry, who won over 75% of the vote. Every city and town voted Democratic. George W Bush in 2004 was the last Republican to break 20% of the county's vote, his father (George H.W. Bush) in 1988 was the last to break 30% of the vote, and Ronald Reagan in 1984 was the last to break 40% of the vote (carrying 40.01%)

The California Secretary of State, as of February 2019, reports that there are 883,942 registered voters in Alameda County. 489,759 (55.4%) are registered Democrats, 95,587 (10.8%) are registered Republicans, 36,649 (4.1%) are registered to minor political parties, and 261,947 (29.6%) declined to answer. Every city, town, and unincorporated area in Alameda County has more registered Democrats than Republicans.[51]

On November 4, 2008, Alameda County voted 61.92% against Proposition 8, which won statewide, and which amended the California Constitution to ban same-sex marriage. The county garnered the sixth highest "no" vote, by percentage, of all California counties, and was the second largest county, by total voter turnout, to vote against it.

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