The age to start kindergarten in Texas is 5 years old by September 1 of the school year. If a child turns 5 before September 1, they are eligible to enroll in kindergarten for that year. There are some exceptions for younger children, but generally, the rule is that the child must be 5 on or before September 1 to start kindergarten in Texas. So, children typically start kindergarten at age 5 in Texas. This cutoff date creates some variation within the cohort, with some children being almost 6 and some just turned 5 when starting kindergarten. This age requirement is supported by Texas education law and is the standard for public schools in the state. Younger children may be admitted only under special conditions and assessments, but this is uncommon and requires district approval. Let me know if you want more details on exceptions or readiness considerations for kindergarten in Texas.