San Mar is a city located in Maryland. San Mar has a 2020 population of 168. San Mar is currently declining at a rate of 0.00% annually and its population has decreased by -56.25% since the most recent census, which recorded a population of 384 in 2010. San Mar reached it's highest population of 384 in 2010.
The average household income in San Mar is $40,647 with a poverty rate of 18.18%. The median rental costs in recent years comes to - per month, and the median house value is $276,500. The median age in San Mar is 77.5 years, 72 years for males, and 77.5 years for females. For every 100 females there are 15.1 males.