Portia is a town located in the U.S. state of Arkansas. It is within Lawrence County. There is only one major highway running through the town, the US 63. It coordinates at 36°5′7″N 91°4′6″W. The elevation is 259 feet above sea level. As of the 2010 census data, it had a total population of 437. The population density was 324.55/sq mi. Estimated per capita income in 2015 was $16,479. It has Zip code 72457.