Tillar is a town located in the U.S. state of Arkansas. It is within both Desha and Drew counties. Tillar has a total area of 0.74 square miles at 33°42′41″N 91°27′11″W. The elevation is 148 feet above sea level. As of the 2010 census data, it had a total population of 225. The population density was 299.86/sq mi. Estimated per capita income in 2016 was $19,966. It has Zip code 71670.