Tex. Ins. Code § 562.202
An action for an injunction under this subchapter may be commenced in a district court in:
(1) the county in which the person against whom the action is brought:
Added by Acts 2009, 81st Leg., R.S., Ch. 1331 (H.B. 4341), Sec. 1, eff. April 1, 2010.