Sea Cliff is a city located in New York. With a 2020 population of 5,041, it is the 168th largest city in New York and the 4733rd largest city in the United States. Sea Cliff is currently declining at a rate of -0.06% annually but its population has increased by 0.92% since the most recent census, which recorded a population of 4,995 in 2010. Sea Cliff reached it's highest population of 5,890 in 1970. Spanning over 2 miles, Sea Cliff has a population density of 4,522 people per square mile.
The average household income in Sea Cliff is $166,358 with a poverty rate of 7.17%. The median rental costs in recent years comes to $2,151 per month, and the median house value is $677,400. The median age in Sea Cliff is 48 years, 44.9 years for males, and 49.8 years for females. For every 100 females there are 94.5 males.