Red pins on the map show jurisdictions where more than 10 percent of residents are uninsured. Orange pins are for counties where the uninsured rate is below 10 percent. As you click through the pins, here are some things you should know:

• These are the numbers of Marylanders in each county who signed up for a private health insurance plan through the state’s new online health insurance marketplace, which was made possible by the Affordable Care Act. The numbers were made public by exchange officials last week and count all sign-ups as of May 31. Overall, Maryland enrolled 72,207 people in these plans, a rate that was one of the lowest in the country.

• The numbers on the map do not include new Medicaid enrollments, which far exceeded the expectations of many state officials and will likely drive down the number of uninsured residents. Some Marylanders did not realize they qualified for Medicaid until they tried to sign up for a private plan. Plus, Medicaid enrollment is open year-round unlike the private plans that are mostly confined to open enrollment periods. (The first ran Oct. 1 to March 31. The second opens Nov. 15.)

• Population counts are based on the latest estimates from the Census Bureau.

• Census officials have estimated the percentage of people in each county who do not have health insurance, according to data collected from 2010 to 2012 as part of the American Community Survey. In Maryland, Queen Anne’s County had the lowest rate with 5.3 percent, and Prince George’s County had the highest with 15.5 percent.

• You will notice that the highest uninsured rates are in the state’s most populous areas — Baltimore and Montgomery and Prince George’s counties — and some of the most rural areas on the Eastern Shore and in Garrett County in far western Maryland.

• When looking at private plan sign-ups, Montgomery County appears to have been the best performer. It had 20,430 sign-ups, which is about 2 percent of all county residents, the highest rate in the state.

Since this map was first posted on Thursday morning, exchange officials released updated numbers. The map now reflects those changes.