The school moved to its current campus in 1953 as the result of a land grant by trustee Fritz Orr.

[6][independent source needed] Westminster is situated on a wooded campus of 180 acres (0.73 km2) in the Buckhead community of Atlanta.

Barge Commons (2021) serves as the “front door” of the campus, housing a chapel overlooking the high school buildings lining both sides, a computer lab, snack bar, and admissions office, as well as many places for students to relax and socialize.

For the 2012–13 school year, Westminster was named the nation's best overall sports program for its eleven state championships and four second-place finishes.

[10] Nearly a decade later, for the 2021-22 school year, Westminster was again named the nation's best overall sports program with ten state championships, two second-place finishes, and a final four appearance from the boys' soccer team.

The boys' team has yielded many Division 1 NCAA scholarship tennis players over the years, and it has won several regional tournaments as well.

The men's and women's swimming & diving teams have won 34 state championships under former coach Pete Higgins, whose accolades through 51 years of coaching include membership in the Georgia Aquatics Hall of Fame, recognition of January 5, 1990 as Pete Higgins Day by the City of Atlanta, among others.

In 2015, Westminster's football team won the AAA state championship for the first time in 37 years against rival Blessed Trinity Catholic High School in overtime, with a final score of 38–31.

Westminster's boys and girls soccer teams have won the most state championships in Georgia High School history.

Since its inception in 2010, the program has won 8 awards and 7 honorable mentions from the National Academy of Television Arts and Sciences Southeast division.

[14] In 2017, WCAT won its first-ever National Student Production Award from NATAS for Best Sports – Live Event Broadcast.