Garrett, WA has a population of 1,601 and is the 12,327th largest city in the United States. The population density is 894 per sq mi which is 824% higher than the Washington average and 886% higher than the national average. The median age in Garrett is 31 which is approximately 19% lower than the Washington average of 38. In Garrett, 70% of the population over 15 years of age are married, 80% speak English and 20% speak Spanish. 53% of Garrett residents were born in Washington, 36% were born out of state, 2% were born outside of the United States and 9% were foreign born.