Commissioner J.J. Koch, District 2 - Dallas County Share: Government Commissioner J.J. Koch, District 2 - Dallas County Visit Website 6820 LBJ Freeway Ste 3500 3rd Floor Coppell, TX 75019 (214) 653-6100 (214) 653-6315 (fax) Map What's Nearby? Distance: 5 10 15 20 25 50 mi.