Trends · data through September 2026

Warehouse Clubs in Chicago-Naperville-Elgin, IL-IN

Iceflower tracks 79 stores from 37 warehouse club chains in Chicago-Naperville-Elgin, IL-IN. Costco grew fastest over the last year, ahead of Sam's Club and Illco.

Rankings come from real card and bank transactions across a panel of 130M+ US and EU consumers. We publish relative growth and rankings, never revenue figures. About the data

Tracked chains
37
Tracked stores
79
Consumer panel
130M+

Growth ranking

Fastest-growing tracked warehouse club chains

Ranked by year-over-year growth of share of tracked local spend. Arrows show movement in the rankings since last year. Each dot in the chart is one tracked chain: bigger market position to the right, faster growth higher up, more tracked stores in a bigger dot. Colors match the store map below. Costco and Sam's Club sit in the high-growth half.

# Chain YoY growth
RankChainRank movementYoY growth
1 C Costco logo Costco - +1.3%
2 S Sam's Club logo Sam's Club - -1.8%
3 I Illco - -41.1%
  • Costco
  • Sam's Club
  • Sams Beauty Warehouse
  • American Distributors
  • Willow Electrical Supply
  • Ak Wholesale Inc
  • Aviva Wholesale
  • Other tracked chains

Store footprint

Store map

79 tracked store locations in Chicago-Naperville-Elgin, IL-IN. The 7 largest tracked chains are highlighted.

  • Costco (25)
  • Sam's Club (17)
  • Sams Beauty Warehouse (1)
  • American Distributors (1)
  • Willow Electrical Supply (1)
  • Ak Wholesale Inc (1)
  • Aviva Wholesale (1)
  • Other tracked chains

Top tracked chains by store count

  • 1 C Costco logo Costco 25
  • 2 S Sam's Club logo Sam's Club 17
  • 3 I Illco 3
  • 4 V Vitaminka 1
  • 5 C Chicago Basil 1
  • 6 O Olympia Trading 1
  • 7 H Hebron Imports 1
  • 8 C Craig Bachman Imports Inc 1
  • 9 T Tri-County Landscape Supply 1
  • 10 S Sanctuary Traders 1
  • 11 C CAG Wholesale 1
  • 12 A American Green Smoke 1
  • 13 S Star Distributors 1
  • 14 C Chicagoland Merchants' Market 1
  • 15 B BJ's 1
  • 16 T Touge Factory 1
  • 17 I Ink Smith Inc 1
  • 18 Z ZZ Wholesale 1
  • 19 H HS Wholesale 1
  • 20 D Discount Dash 1
  • 21 S Sams Beauty Warehouse logo Sams Beauty Warehouse 1
  • 22 A American Distributors 1
  • 23 W Willow Electrical Supply 1
  • 24 A Ak Wholesale Inc 1
  • 25 A Aviva Wholesale logo Aviva Wholesale 1
  • 26 J Joong Boo Warehouse Market logo Joong Boo Warehouse Market 1
  • 27 A Apet Inc 1
  • 28 B Bee Sales Co 1
  • 29 C Chicago Import Inc 1
  • 30 R RN International 1
  • 31 9 911 Volts 1
  • 32 V Villa Park Electrical Supply Co. 1
  • 33 T TriStar Pipe & Supply 1
  • 34 D Dearborn Marketplace 1
  • 35 G Golden Country Oriental Food 1
  • 36 B Budgets N Bundles 1
  • 37 A American Beauty Equipment 1

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