If the numbers the Gazette put are correct, and I will say I question CR Washington (because I think they may take in Metro High Students) and I question Dubuque Wahlert, this is what I came up with.
5A
I tried to combine geography and previous success, my guess is that they won't have an east and west like I do, because there is more powers on the west, but this could work.
District 1
Cedar Falls
Waterloo West
Marshalltown
CR Prairie
Linn-Mar
CR Jefferson
District 2
IC West
IC City
Ottumwa
CR Kennedy
Muscatine
Davenport North
District 3
Bettendorf
Pleasant Valley
Hempstead
Senior
Davenport Central
Davenport West
District 4
Southeast Polk
Waukee
Centennial
DSM Roosevelt
DSM North
SC North
District 5
Dowling
Johnston
Waukee NW
Ames
DSM East
SC West
District 6
Valley
Ankeny
Urbandale
SC East
DSM Lincoln
CB Lincoln
4A
Again I took into account previous success a bit with these districts, but there are some outliers that make that difficult.
District 1
Fort Dodge
Webster City
LeMars
Storm Lake
Denison Schelswig
Spencer
District 2
Mason City
Decorah
WSR
Waterloo East
Xavier
CR Washington
District 3
Western Dubuque
Marion
North Scott
Clinton
CCA
IC Liberty
District 4
Fort Madison
Burlington
Mt Pleasant
Oskaloosa
Pella
Newton
District 5
Indianola
Boundurant Farrar
Carlisle
Norwalk
DSM Hoover
Boone
District 6
CB Jefferson
Lewis Central
Glenwood
Winterset
Perry
DCG
3A
I split up a nice neat district around Des Moines because every corner around the state seems to need an extra team.
District 1
SBL
Heelan
MOC/FV
BH/RV
Sioux Center
Carroll
District 2
Algona
Humboldt
Hampton Dumont
Charles City
Gilbert
Nevada
District 3 (If Wahlert's number is wrong they would easily replace Mt Vernon)
Maquoketa
Central DeWitt
Assumption
Solon
Mt Vernon
CPU
District 4
Keokuk
West Burlington ND
Fairfield
Washington
Grinnell
Knoxville
District 5
West Delaware
Independence
Vinton Shellsburg
Benton
South Tama
Ballard
District 6
Harlan
Atlantic
Creston
ADM
Saydel
North Polk
2A
District 1
West Lyon
CL/GLR
Unity Christian
Sheldon
Cherokee
Okoboji
District 2
Spirit Lake
Estherville
Pocahontas
Forest City
GHV
Clear Lake
District 3
Osage
Crestwood
New Hampton
Waukon
NFV
Oelwein
District 4
OABCIG
Greene County
SE Valley
Red Oak
Clarinda
Shenandoah
District 5
Clarion Goldfield Dows
Iowa Falls Alden
Roland Story
West Marshall
DSM Christian
PCM
District 6
Clarke
Chariton
Centerville
Davis County
Albia
EBF
District 7
Central Lee
Mid Prairie
Williamsburg
West Liberty
Tipton
Camanche
District 8 (If Wahlert's number is wrong, Mt Vernon easily fits in this district)
Jesup
Union
Wahlert
Monticello
Anamosa
Northeast Goose Lake
1A
District 1
West Sioux
Western Christian
Sibley O
Emmetsburg
Sioux Central
Ridge View
District 2
MVAOCOU
West Monona
Underwood
Treynor
Kuemper
East Sac
District 3
NW Webster
South Central Calhoun
ACGC
Panorama
Woodward Granger
West Central Valley
District 4
Nodway Valley
Van Meter
I35
Central Decatur
Pleasantville
East Marshall
District 5
Sigourney Keota
Cardinal
Van Buren
Mediapolis
Louisa Muscatine
Pella Christian
District 6 (I broke a state rule here)
Durant
Wilton
West Branch
Regina
Beckman
Cascade
District 7
MFL
Postville
Sumner Fredricksburg
Denver
Columbus
DNH
District 8
AP
South Hardin
South Hamilton
Eagle Grove
Belmond Klemme
Central Springs
Class A (I went with the assumption that the only 8 man team moving up was AGWSR, and the only one moving down was Garrigan because they said they are. That leaves 58 teams so I did 8, 6 team districts and 2, 5 team districts that are sister districts
District 1
Akron Westfield
Hinton
Westwood
Woodbury Central
Lawton Bronson
District 2
Gehlen
MMCRU
South O'Brien
Alta Aurelia
HMS
District 3
St Edmonds
North Union
West Hancock
Newman
Lake Mills
St. Ansgar
Disrict 4
West Fork
AGWSR
North Butler
Nashua Plainfield
Wapsie
South Winn
District 5
Starmont
East Buc
Ed-Co
Maq Valley
Clayton Ridge
Bellevue
District 6
Alburnett
North Linn
Hudson
North Tama
BCLUW
Grundy Center
District 7
Lisbon
North Cedar
Highland
Pekin
Columbus
Wapello
District 8
Belle Plaine
North Mahaska
Lynnville Sully
Colfax Mingo
Madrid
Ogden
District 9
Wayne
Mount Ayr
Southwest Valley
Sidney
Riverside
St. Albert
District 10
Earlham
IKM Manning
AHSTW
Tri Center
Missouri Valley
LoMa
8 Man (70 teams, so 10 7 team districts that can be put into sister districts)
District 1
Siouxland Christian
River Valley
Kingsley Pierson
Newell Fonda
Remsen St Mary's
Harris Lake Park
GTRA
District 2
Boyer Valley
Glidden Ralston
Ar-We-Va
Coon Rapids Bayard
Audubon
Woodbine
West Harrison
District 3
West Bend Mallard
Garrigan
North Iowa
Northwood Kennsett
Rockford
Clarksville
Riceville
District 4
Janesville
Dunkerton
Tripoli
West Central
Turkey Valley
Kee High
Central Elkader
District 5
Don Bosco
Iowa Valley
Central City
Springville
Midland
Easton Valley
Calamus Wheatland
District 6
HLV
BGM
GMG
Meskwaki
Gladbrook Rienbeck
Colo Nesco
Collins- Maxwell
District 7
New London
WMU
WACO
Lone Tree
Tri County
English Valleys
Montezuma
District 8
Moravia
Twin Cedars
Melcher Dallas
Southeast Warren
Martensdale St. Marys
Grandview Christian
Baxter
District 9
Seymour Moulten Udell
Lamoni
Mormon Trail
Murray
East Union
Lenox
Bedford
District 10
Clarinda Academy
Fremont Mills
East Mills
Stanton
Griswold
Exira EHK
CAM
The 8 man districts were a struggle for me