Here are lists of schools which only admit girls, or those which only admit girls at certain levels/years/grades, or those which separate students by gender at certain points (such as the Diamond Schools model), by country.
Note that government schools in this country are separated by gender. [1]
Former:
This list covers Mainland China only. For Hong Kong and Macau see their respective lists. For schools in the Taiwan area, including the island of Taiwan, go to "Taiwan (Republic of China)"
Former:
Now coeducational:
Since the Iranian Revolution government schools have been divided by gender
Al Mutamayizeen Secondary has girls' schools.
Former:
Irish Institute in the State of Mexico has a separate campus for girls.
Universidad Panamericana Preparatoria in Mexico City has a separate campus for girls.
Secondary girls’ schools
Previously girls' schools: