Keiser is a city located in the U.S. state of Arkansas. It is within Mississippi County and derived its name from John Keiser. It has a total land area of 0.4 square miles at 35°40′28″N 90°5′46″W. The elevation is 230 feet above sea level. As of the 2010 census data, it had a total population of 759. The population density was 1,887.36/sq mi. Estimated per capita income in 2015 was $14,480. It is using Zip code 72351.