Siouxland Coalition Against Human Trafficking Share: Non-Profit Organizations Siouxland Coalition Against Human Trafficking Visit Website PO Box 5455 Sioux City, IA 51102-5455 (712) 281-4840 About Map About We work toward abolishing all forms of human trafficking through education, collaboration and advocacy. Serving the Siouxland area, our primary focus is education and prevention. What's Nearby? Distance: 5 10 15 20 25 50 mi.