We begin our listing of attendance figures for the 2010 season; here are the attendance figures for summer-collegiate leagues, listed by average.
| # | Team | League | 2009 | GMS | 2,010 | AV +/- |
| 1 | Madison Mallards | NorthWL | 5,991 | 33 | 5,884 | -0.02 |
| 2 | La Crosse Loggers | NorthWL | 3,266 | 33 | 3,174 | -0.03 |
| 3 | Fayetteville Swampdogs | CPL | 2,217 | 23 | 2,335 | 0.05 |
| 4 | Newport Gulls | NECBL | 20 | 2,284 | ||
| 5 | Eau Claire Express | NorthWL | 2,011 | 33 | 2,132 | 0.06 |
| 6 | St. Joseph Mustangs | MINK | 21 | 2,129 | ||
| 7 | Orleans Firebirds | CCL | 2,209 | 20 | 2,019 | -0.09 |
| 8 | Danville Dans | PL | 2,204 | 25 | 1,890 | -0.14 |
| 9 | Forest City Owls | CPL | 2,255 | 28 | 1,802 | -0.20 |
| 10 | Wisconsin Woodchucks | NorthWL | 1,603 | 33 | 1,766 | 0.10 |
| 11 | St. Cloud River Bats | NorthWL | 1,755 | 28 | 1,752 | 0.00 |
| 12 | Wilmington Sharks | CPL | 1,855 | 27 | 1,734 | -0.07 |
| 13 | Chillicothe Paints | PL | 1,524 | 28 | 1,714 | 0.12 |
| 14 | Wilson Tobs | CPL | 1,687 | 28 | 1,694 | 0.00 |
| 15 | Waterloo Bucks | NorthWL | 1,428 | 33 | 1,660 | 0.16 |
| 16 | Peninsula Pilots | CPL | 1,875 | 27 | 1,614 | -0.14 |
| 17 | Brazos Valley Bombers | TCL | 26 | 1,608 | ||
| 18 | Gastonia Grizzlies | CPL | 1,637 | 25 | 1,574 | -0.04 |
| 19 | Keene Swamp Bats | NECBL | 21 | 1,547 | ||
| 20 | Hyannis Harbor Hawks | CCL | 1,581 | 20 | 1,500 | -0.05 |
| 21 | Walla Walla Sweets | WCL | 24 | 1,451 | ||
| 22 | Wisconsin Rapids Rafters | NorthWL | 34 | 1,368 | ||
| 23 | Bend Elks | WCL | 1,305 | 24 | 1,327 | 0.02 |
| 24 | Marysville Gold Sox | HOR | 44 | 1,320 | ||
| 25 | Florence Redwolves | CPL | 1,609 | 25 | 1,316 | -0.18 |
| 26 | Wenatchee AppleSox | WCL | 1,476 | 24 | 1,301 | -0.12 |
| 27 | Springfield Sliders | PL | 1,703 | 26 | 1,284 | -0.25 |
| 28 | Hannibal Cavemen | PL | 1,300 | 27 | 1,269 | -0.02 |
| 29 | Y-D Red Sox | CCL | 1,660 | 21 | 1,260 | -0.24 |
| 30 | Mankato MoonDogs | NorthWL | 1,266 | 35 | 1,211 | -0.04 |
| 31 | Duluth Huskies | NorthWL | 1,153 | 27 | 1,211 | 0.05 |
| 32 | Falmouth Commodores | CCL | 1,112 | 19 | 1,209 | 0.09 |
| 33 | Chatham Anglers | CCL | 1,844 | 22 | 1,196 | -0.35 |
| 34 | Asheboro Copperheads | CPL | 934 | 27 | 1,193 | 0.28 |
| 35 | Holyoke Bue Sox | NECBL | 20 | 1,181 | ||
| 36 | Green Bay Bullfrogs | NorthWL | 1,149 | 32 | 1,176 | 0.02 |
| 37 | Rochester Honkers | NorthWL | 1,229 | 34 | 1,173 | -0.05 |
| 38 | Morehead City Marlins | CPL | 26 | 1,145 | ||
| 39 | Columbia Blowfish | CPL | 1,215 | 25 | 1,144 | -0.06 |
| 40 | Wareham Gatemen | CCL | 1,121 | 21 | 1,131 | 0.01 |
| 41 | Brewster Whitecaps | CCL | 1,197 | 21 | 1,120 | -0.06 |
| 42 | Cotuit Kettleers | CCL | 1,040 | 21 | 1,119 | 0.08 |
| 43 | Nashville Outlaws | PL | 23 | 1,080 | ||
| 44 | Thomasville HiToms | CPL | 1,033 | 27 | 1,072 | 0.04 |
| 45 | Vermont Mountaineers | NECBL | 21 | 1,037 | ||
| 46 | Harwich Mariners | CCL | 1,183 | 21 | 1,018 | -0.14 |
| 47 | Alexandria Aces | TCL | 27 | 1,012 | ||
| 48 | Willmar Stingers | NorthWL | 32 | 1,007 | ||
| 49 | Martinsville Mustangs | CPL | 983 | 28 | 1,002 | 0.02 |
| 50 | Corvallis Knights | WCL | 638 | 24 | 1,001 | 0.57 |
| 51 | Victoria Generals | TCL | 27 | 994 | ||
| 52 | Quincy Gems | PL | 597 | 24 | 982 | 0.64 |
| 53 | Richmond River Rats | PL | 994 | 28 | 933 | -0.06 |
| 54 | Cowlitz Black Bears | WCL | 24 | 929 | ||
| 55 | Alexandria Beetles | NorthWL | 925 | 33 | 892 | -0.04 |
| 56 | West Virginia Miners | PL | 28 | 881 | ||
| 57 | Bourne Braves | CCL | 942 | 21 | 874 | -0.07 |
| 58 | Outer Banks Daredevils | CPL | 955 | 27 | 871 | -0.09 |
| 59 | Edenton Steamers | CPL | 887 | 24 | 832 | -0.06 |
| 60 | Danbury Westerners | NECBL | 18 | 830 | ||
| 61 | Terre Haute Rex | PL | 28 | 825 | ||
| 62 | Battle Creek Bombers | NorthWL | 958 | 29 | 790 | -0.18 |
| 63 | East Texas Pump Jacks | TCL | 28 | 778 | ||
| 64 | Petersburg Generals | CPL | 792 | 27 | 696 | -0.12 |
| 65 | North Adams SteepleCats | NECBL | 21 | 687 | ||
| 66 | North Shore Navigators | NECBL | 21 | 681 | ||
| 67 | Moses Lake Pirates | WCL | 580 | 24 | 669 | 0.15 |
| 68 | Kelowna Falcons | WCL | 616 | 24 | 667 | 0.08 |
| 69 | Thunder Bay Border Cats | NorthWL | 668 | 33 | 651 | -0.03 |
| 70 | Kitsap BlueJackets | WCL | 468 | 23 | 616 | 0.32 |
| 71 | Butler Blue Sox | PL | 641 | 25 | 563 | -0.12 |
| 72 | Bethesda Big Train | CalR | 20 | 517 | ||
| 73 | Bellingham Bells | WCL | 579 | 23 | 499 | -0.14 |
| 74 | Sanford Mainers | NECBL | 21 | 494 | ||
| 75 | Brainerd Blue Thunder | NorthWL | 554 | 33 | 483 | -0.13 |
| 76 | Leesburg Lightning | FCSL | 20 | 450 | ||
| 77 | Dupage Dragons | PL | 349 | 20 | 379 | 0.09 |
| 78 | New Bedford Bay Sox | NECBL | 20 | 370 | ||
| 79 | Slippery Rock Sliders | PL | 222 | 28 | 329 | 0.48 |
| 80 | Laconia Muskrats | NECBL | 21 | 304 | ||
| 81 | DeLand Suns | FCSL | 19 | 283 | ||
| 82 | Bristol Collegiate | NECBL | 20 | 279 | ||
| 83 | Dekalb County Liners | PL | 22 | 278 | ||
| 84 | Dubois County Bombers | PL | 248 | 27 | 277 | 0.12 |
| 85 | Texas TomCats | TCL | 25 | 265 | ||
| 86 | Alexandria Aces | CalR | 20 | 250 | ||
| 87 | Nevada Griffons | MINK | 16 | 222 | ||
| 88 | Lorain County Ironmen | PL | 87 | 26 | 209 | 1.40 |
| 90 | Lowell All-Americans | NECBL | 20 | 180 | ||
| 90 | McKinney Marshals | TCL | 14 | 149 | ||
| 91 | Winter Park Diamond Dawgs | FCSL | 29 | 130 | ||
| 92 | Orlando Mavericks | FCSL | 18 | 117 | ||
| 93 | Silver Spring Takoma T-Bolts | CalR | 17 | 112 | ||
| 94 | Sanford River Rats | FCSL | 20 | 98 | ||
| 95 | Youses Orioles | CalR | 17 | 96 | ||
| 96 | North Texas Copperheads | TCL | 17 | 77 | ||
| 97 | Herndon Braves | CalR | 16 | 44 | ||
| 98 | Rockville Express | CalR | 17 | 30 |
CalR = Cal Ripken League
CCL = Cape Cod League
CPL = Coastal Plain League
FCSL = Florida Collegiate Summer League
HOR = Horizon Air Series
NECBL = New England Collegiate Baseball League
NorthWL = Northwoods League
MINK = M.I.N.K. League
PL = Prospect League
TCL = Texas Collegiate League
WCL = West Coast League
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