Demographics & People — San Miguel CDP (Contra Costa County), California

Population Overview

Population (Census)	3,991
Estimated 2026	~3,900
Median Age	48.4
Total Households	1,347
Family Households	1,143
Average Household Size	2.95
Diversity Index	0.2582 (somewhat diverse)

Race & Ethnicity

White	3,274
Black or African American	37
Asian	264
Hispanic or Latino	250

Heritage & Ancestry

Group	Count
German	881
Scottish	709
Other groups	669
English	650
Unclassified or not reported	617
Irish	385
Norwegian	260
Hispanic: Hispanic or Latino	234
Portuguese	200
Hispanic: Mexican	178

Language

English Only	3,321
Spanish	115
Population 5+	3,868

Veterans

Veterans	136
Population 18+	3,048

Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for San Miguel CDP (Contra Costa County), California.