Ruby is a city located in South Carolina. With a 2020 population of 336, it is the 211th largest city in South Carolina and the 14906th largest city in the United States. Ruby is currently declining at a rate of -0.59% annually and its population has decreased by -6.67% since the most recent census, which recorded a population of 360 in 2010. Ruby reached it's highest population of 350 in 2010. Spanning over 2 miles, Ruby has a population density of 136 people per square mile.
The average household income in Ruby is $58,135 with a poverty rate of 12.90%. The median rental costs in recent years comes to $497 per month, and the median house value is $106,300. The median age in Ruby is 42 years, 42.5 years for males, and 41 years for females. For every 100 females there are 83.4 males.