Winthrop is a city located in Washington. With a 2020 population of 510, it is the 237th largest city in Washington and the 13229th largest city in the United States. Winthrop is currently growing at a rate of 3.87% annually and its population has increased by 29.44% since the most recent census, which recorded a population of 394 in 2010. Winthrop reached it's highest population of 510 in 2021. Spanning over 1 miles, Winthrop has a population density of 547 people per square mile.
The average household income in Winthrop is $64,988 with a poverty rate of 17.10%. The median rental costs in recent years comes to $650 per month, and the median house value is $245,100. The median age in Winthrop is 46.2 years, 46.2 years for males, and 46.2 years for females. For every 100 females there are 100.0 males.