East Central Intergovernmental Association is a membership supported organization compromised of local governmental bodies in the following five counties:
| Cedar | Clinton | Delaware | Dubuque | Jackson |
|---|---|---|---|---|
| Bennett | Andover | Colesburg | Asbury | Andrew |
| Clarence | Calamus | Delaware | Balltown | Baldwin |
| Durant | Camanche | Delhi | Bankston | Bellevue |
| Lowden | Charlotte | Dundee | Bernard | LaMotte |
| Mechanicsville | Clinton | Earlville | Cascade | Maquoketa |
| Stanwood | Delmar | Edgewood | Centralia | Miles |
| Tipton | DeWitt | Greeley | Dubuque | Monmouth |
| West Branch | Goose Lake | Hopkinton | Durango | Preston |
| Grand Mound | Manchester | Dyersville | St. Donatus | |
| Lost Nation | Masonville | Epworth | Sabula | |
| Low Moor | Ryan | Farley | Spragueville | |
| Toronto | Graf | Springbrook | ||
| Welton | Holy Cross | |||
| Wheatland | Luxemburg | |||
| New Vienna | ||||
| Peosta | ||||
| Rickardsville | ||||
| Sageville | ||||
| Sherrill | ||||
| Worthington | ||||
| Zwingle |
