Hornsby-Dunlap Elementary School discovered to be the oldest school in Travis County.

According to Austin American-Statesman, Hornsby-Dunlap Elementary School is the oldest continuous operating public school in Travis County and Austin. (Ref: Austin American-Statesman, County's oldest elementary teaches lessons in Del Valle, June 24, 1993)

In fact, Hornsby-Dunlap Elementary School is the oldest school in Travis County next to Pleasant Hill School (Pleasant Hill Elementary School), Eanes School, Eanes Elementary School, Texas School for the Deaf, Pease School (Pease Elementary School), Anderson High School, and Austin High School.

 
Hornsby-Dunlap School is named for Reuben Hornsby, founder of Hornsby's Bend, who surveyed the land in the 1840s.

The original Hornsby Prairie School was established in 1837 as Hornsby Prairie School in a church next to the Hornsby Cemetery. A new log cabin was built in 1867. During the same year is when the Hornsby School District was established. Hornsby Prairie School eventually became Hornsby School.

In 1905, Hornsby and Dunlap consolidated their school districts to become Hornsby-Dunlap Common School District. It was during the same year when Dunlap School was closed down and merged to become Hornsby-Dunlap School. Hornsby-Dunlap School was a 1-8 school as most rural schools were. This continued during the 1930s as well.

Sometime during the 20th century is when Hornsby-Dunlap School became Hornsby-Dunlap Elementary School. As of 2018, Hornsby-Dunlap Elementary School is a K-6 school serving students in grades Kindergarden through 6th grade. The historic school continues to operate today.

Hornsby-Dunlap Elementary School is located at 13901 FM 969, Austin, Texas, US 78724.