Rogers-Lowell Edges LR Regional as Largest Chamber of Commerce in Arkansas by Arkansas Business Staff Posted 8/26/2013 12:00 am Updated 11 months ago With five more members than Little Rock Regional, Rogers-Lowell Area Chamber of Commerce takes top spot as largest in the state. Get the List: Download the list of chambers of commerce in Arkansas. Rogers-Lowell has 2,117 members, No. 2 Little Rock Regional has 2,112 and North Little Rock at No. 3 has 1,575. The Conway and Texarkana chambers of commerce round out the top five.