Approximately 1.1 million people in the United States have HIV — and one in seven of them don't even know it, according to the Atlanta-based Centers for Disease Control and Prevention.

» RELATED: New study on STDs finds Georgia among ‘most diseased’ states

Georgians fare worse than most other states, ranking fifth nationally in the number of HIV diagnoses in 2015.

If current HIV diagnoses rates persist, one in 51 Georgians is likely to be diagnosed with HIV over the course of their lifetime, making it the nation's second-highest state for lifetime risk of HIV infection, according to a 2016 CDC analysis.

This National HIV Testing Day on Tuesday, June 27, the theme "Test Your Way. Do It Today" acts as a reminder to get tested.

According to the CDC, an estimated 62 percent of American adults over the age of 18 have never been tested for HIV, despite expert recommendations that everyone between the ages 13 and 64 get tested at least once.

Free HIV testing will be provided at a number of locations, including some local clinics and testing events.

Walgreens, in partnership with Greater Than Aids, is also providing free testing at more than 220 stores around the country.

Where to get free HIV testing in metro Atlanta on National HIV Testing Day:

Cobb County

Marietta Public Health Center

1650 County Services Parkway

Marietta, GA 30008

June 27: 10 a.m. - 3 p.m.

Fulton County

The Mall-West End

850 Oak Street

Atlanta, GA 30310

June 27: 11 a.m. - 8 p.m. (last test at 7 p.m.)

Dugans

777 Ponce de Leon Avenue NE

Atlanta, GA 30306

June 27: 8 p.m. - 12 a.m.

Walgreens

7530 Roswell Road

Sandy Springs, GA 30350

June 27-29: 3-7 p.m.

Walgreens

25 Peachtree Street SE

Atlanta, GA 30303

June 27-29: 3-7 p.m.

Walgreens

2711 Metropolitan Parkway SW

Atlanta, GA 30315

June 27-29: 3-7 p.m.

Walgreens

3740 Cascade Road SW

Atlanta, GA 30331

June 27-29: 3-7 p.m.

Walgreens

595 Piedmont Avenue NE

Atlanta, GA 30308

June 27-29: 3-7 p.m.

Gwinnett County

Walgreens

5985 Peachtree Pkwy

Norcross, GA 30092

June 27-29: 3-7 p.m.

DeKalb County

Walgreens

3584 Wesley Chapel Road

Decatur, GA 30034

June 27-29: 3-7 p.m.

Walgreens

5320 Memorial Drive

Stone Mountain, GA 30083

June 27-29: 3-7 p.m.

Walgreens

2945 Panola Road

Lithonia, GA 30038

June 27-29: 3-7 p.m.

Walgreens

2035 Candler Road

Decatur, GA 30032

June 27-29: 3-7 p.m.

Walgreens

2320 North Druid Hills Road NE

Atlanta, GA 30329

June 27-29: 3-7 p.m.

You can also use CDC's "Doing It" testing locator, text your ZIP code to KNOWIT (566948) or call 1-800-CDC-INFO (232-4636) to find a testing site near you.

Nationwide, researchers found half of black gay men and a quarter of Latino gay men are projected to be diagnosed within their lifetime if current HIV diagnoses rates persist.

People living in the South — including Georgia — are also more likely to be diagnosed with HIV over the course of their lifetime than other Americans.

In 2013, the Atlanta-Sandy Springs-Roswell area ranked fifth among metropolitan areas in the nation for HIV diagnoses.

Dr. Patrick Sullivan, an epidemiology professor at Emory University, called the South's struggle with HIV "a public health emergency" in a previous AJC report.

» RELATED: HIV epidemic afflicting Georgia, the South a ‘public health emergency’

Sullivan, like many other experts, cited poverty as a major factor; the South is home to the nation’s largest number of people living in poverty.

More about National HIV Testing Day at CDC.gov.