Table 1
Number of Households, Bay Area Counties: 1930-2010

	1930	1940	1950	1960	1970	1980	1990	2000	2010
San Francisco	178,625 *	206,011	257,734	291,975	295,174	298,956	305,584	317,730	333,200
San Mateo	20,793 *	33,516	71,448	135,179	185,028	225,201	241,914	255,890	268,710
Santa Clara	40,169 *	51,916	85,424	184,945	322,782	458,519	520,180	566,010	619,200
Alameda	137,090 *	165,201	238,087	295,367	365,093	426,092	479,518	511,080	559,400
Contra Costa	20,717 *	29,830	83,371	117,858	172,951	241,534	300,288	349,830	405,720
Solano	10,909 *	14,559	30,449	38,453	51,120	80,426	113,429	135,360	168,220
Napa	5,709 *	7,679	12,652	18,867	25,098	36,624	41,312	47,760	53,610
Sonoma	18,151 *	21,641	32,947	47,191	67,861	114,474	149,011	178,540	207,370
Marin	10,568 *	13,576	25,208	44,209	67,266	88,723	95,006	102,430	109,890
Region	442,731 *	543,929	837,320	1,174,044	1,552,373	1,970,549	2,246,242	2,464,630	2,725,320

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Table 2
Population in Households, Bay Area Counties: 1930-2010

	1930	1940	1950	1960	1970	1980	1990	2000	2010
San Francisco	634,394 *	634,536	698,176	711,222	689,337	654,511	699,330	762,500	783,000
San Mateo	77,405 *	111,782	227,920	437,705	548,513	580,517	637,628	714,950	735,750
Santa Clara	145,118 *	174,949	272,536	621,610	1,039,685	1,267,671	1,463,219	1,683,100	1,801,740
Alameda	474,883 *	513,011	702,979	875,899	1,036,706	1,077,339	1,242,068	1,418,400	1,518,910
Contra Costa	78,608 *	100,450	279,546	404,230	550,717	649,595	793,585	952,000	1,107,800
Solano	40,834 *	49,118	96,021	125,389	160,344	226,954	326,662	408,800	497,300
Napa	22,897 *	28,503	38,895	57,996	73,212	93,361	105,085	125,550	137,450
Sonoma	62,222 *	69,052	96,717	142,247	198,078	293,392	380,558	467,100	532,100
Marin	41,648 *	52,907	75,668	139,188	197,645	215,273	221,548	245,500	260,200
Region	1,578,009 *	1,734,308	2,488,458	3,515,486	4,494,237	5,058,613	5,869,683	6,777,900	7,374,250

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Table 3
Household Size, Bay Area Counties: 1930-2010

	1930	1940	1950	1960	1970	1980	1990	2000	2010
San Francisco	3.55 *	3.08	2.71	2.44	2.34	2.19	2.29	2.40	2.35
San Mateo	3.72 *	3.34	3.19	3.24	2.96	2.58	2.64	2.79	2.74
Santa Clara	3.61 *	3.37	3.19	3.36	3.22	2.76	2.81	2.97	2.91
Alameda	3.46 *	3.11	2.95	2.97	2.84	2.53	2.59	2.78	2.72
Contra Costa	3.79 *	3.37	3.35	3.43	3.18	2.69	2.64	2.72	2.73
Solano	3.74 *	3.37	3.15	3.26	3.14	2.82	2.88	3.02	2.96
Napa	4.01 *	3.71	3.07	3.07	2.92	2.55	2.54	2.63	2.56
Sonoma	3.43 *	3.19	2.94	3.01	2.92	2.56	2.55	2.62	2.57
Marin	3.94 *	3.90	3.00	3.15	2.94	2.43	2.33	2.40	2.37
Region	3.56 *	3.19	2.97	2.99	2.90	2.57	2.61	2.75	2.71

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Sources:
U.S. Bureau of the Census, Decennial Censuses: 1930-1990
Association of Bay Area Governments, "Projections '96" - Year 2000 and 2010

Note:
Data for 1930 is for number of families, persons in families, and average family size. Household data was first collected by the Bureau of the Census in the 1940 Decennial Census.

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Last Updated: SEP1797, CPurvis
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