Mark Your Calendars for National Night Out in Sioux Falls! That's exactly what National Night Out is all about - and it's returning to Sioux Falls on Tuesday, August 4. The annual event brings residents together with Sioux Falls police officers, firefighters, city leaders, and, most importantly, one another. This year, 13 neighborhood associations will take part, along with 15 neighborhood watch groups spread throughout Sioux Falls. For a complete list of participating neighborhoods and event locations, visit the City of Sioux Falls website before heading out on August 4.