This Visualizing Health Policy infographic illustrates the change in monthly premiums by county, and select cities, from 2014 to 2015 for a 40-year-old person covered by the second-lowest-cost silver “benchmark” plan in the Affordable Care Act’s insurance marketplaces. Premium changes were greatest in Summit County, Colorado (45% decrease) and southeastern Alaska (34% increase), before tax credits. After accounting for tax credits, premiums for a 40-year-old person with an annual income of $30 000 would remain flat in most of the country, as long as the enrollee changed from the 2014 benchmark plan to the plan designated as the benchmark for 2015.