Westfield, NY has a population of 3,394 and is the 8,196th largest city in the United States. The population density is 888 per sq mi which is 148% higher than the New York average and 880% higher than the national average. The median age in Westfield is 43 which is approximately 12% higher than the New York average of 38. In Westfield, 60% of the population over 15 years of age are married, 93% speak English and 4% speak Spanish. 68% of Westfield residents were born in New York, 29% were born out of state, 1% were born outside of the United States and 2% were foreign born.