There are multiple sources of Texas law. 

Source of Law	Description
Texas Constitution	The governing document for our state government.
Statutes	Laws enacted by the state legislature.
Administrative rules	Regulations created by state agencies.
Case law	The body of judicial decisions from the courts.
Attorney general opinions	Persuasive but non-binding interpretations of the law.
Local ordinances	Laws enacted by municipalities and counties at the local level.
Building codes	Technical codes incorporated as law by statutes, rules, and ordinances.

If you have questions about researching Texas laws, you can Ask a Librarian for help.

Also check out our guides to the law where we bring together resources on a particular legal topic like landlord/tenant law or marriage in Texas.