Williams, CA has a population of 5,160 and is the 6,320th largest city in the United States. The population density is 948 per sq mi which is 308% higher than the California average and 946% higher than the national average. The median age in Williams is 32 which is approximately 10% lower than the California average of 36. In Williams, 60% of the population over 15 years of age are married, 31% speak English and 66% speak Spanish. 52% of Williams residents were born in California, 8% were born out of state, 0% were born outside of the United States and 40% were foreign born.