 About 5.8% of families and 7.2% of the population were below the poverty line, including 9.2% of those under the age of 18 and 10.4% of those age 65 and older., Arlington has an estimated 9,481 residents who were in the workforce, either employed or unemployed.The average one-way commute for Arlington workers in 2015 was approximately 30 minutes; 85 percent of workers drove alone to their workplace, while 7 percent carpooled, and 2 percent used public transit.