Buttonwillow, CA has a population of 1,324 and is the 13,449th largest city in the United States. The population density is 191 per sq mi which is 18% lower than the California average and 111% higher than the national average. The median age in Buttonwillow is 30 which is approximately 18% lower than the California average of 36. In Buttonwillow, 63% of the population over 15 years of age are married, 27% speak English and 70% speak Spanish. 61% of Buttonwillow residents were born in California, 8% were born out of state, 1% were born outside of the United States and 30% were foreign born.