Monmouth, CA has a population of 155 and is the 25,526th largest city in the United States. The population density is 503 per sq mi which is 117% higher than the California average and 455% higher than the national average. The median age in Monmouth is 47 which is approximately 29% higher than the California average of 36. In Monmouth, 44% of the population over 15 years of age are married, 37% speak English and 63% speak Spanish. 68% of Monmouth residents were born in California, 14% were born out of state, 0% were born outside of the United States and 18% were foreign born.
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The population density in Monmouth is 117% higher than California.
The median age in Monmouth is 29% higher than California.
In Monmouth 36.77% of the population is White.
In Monmouth 6.45% of the population is Black or African American.