The Humble Grammar School opened during second semester of the 1917-1918 school year. The building had formerly been known as the Humble School, housing grades 1-11.  When Humble High School opened next door for the 1917-1918 school year, the building was renamed as Humble Grammar School, and was for students in grades 1-7. 

The building was destroyed in a pre-dawn fire in January 1929.  The students continued school by doubling up in the Humble High School building.  A new high school building was opened in 1930, Charles Bender High School, at which point the old Humble High School building was renamed as Humble Elementary.