The earthquake left nearly 90,000 people dead or missing, but the government had never said how many of the casualties were students. Most died when their shoddily built elementary and secondary schools collapsed.
Their deaths become a sensitive political issue for the government, with parents of dead children staging protests demanding investigations. Many of the parents have also been subjected to intimidation and financial inducements to silence them.
The student death toll of 19,065 was given at a news conference on preparations for the winter by Wei Hong, executive vice governor of Sichuan.
Wei said that millions of those displaced in the earthquake still need quilts and repairs to their homes if they are to survive the coming winter, expected to be unusually cold.
The earthquake, which was centered in the southwestern province of Sichuan, displaced millions and left China struggling to carry out reconstruction work.
Wei said relief work was important because experts were predicting temperatures would be slightly lower this winter in the area compared to previous years.
"During the post-disaster period of relocations, we have placed at the core the work of making sure that thousands of affected people, especially those living in extremely cold and remote rural areas, will live safely and warmly through this wintertime," Wei said.
He said that although millions of cotton quilts and clothing had been donated already, more was still needed.
Wei said that as of Nov. 12, nearly 200,000 homes had been rebuilt, 685,000 homes were under reconstruction, but that nearly two million households still needed to be rebuilt or repaired.
More than 1,300 schools have been reconstructed or are currently being worked on, and site selection had started for relocating 25 townships, including Beichuan and Wenchuan, two of the most devastated areas.