West Menlo Park, CA has a population of 3,830 and is the 7,642nd largest city in the United States. The population density is 7,867 per sq mi which is 3285% higher than the California average and 8584% higher than the national average. The median age in West Menlo Park is 42 which is approximately 16% higher than the California average of 36. In West Menlo Park, 61% of the population over 15 years of age are married, 82% speak English and 2% speak Spanish. 56% of West Menlo Park residents were born in California, 25% were born out of state, 2% were born outside of the United States and 17% were foreign born.