Ordered by County, then City.
| County | City | Address | Zip Code | Phone # | Store # | Name |
|---|---|---|---|---|---|---|
| BROWN | BELLEVUE | 2355 COSTCO WAY | 54311 | 920-469-5710 | 1162 | Costco |
| DANE | MIDDLETON | 2150 DEMING WAY | 53562 | 608-824-3959 | 1020 | Costco |
| Dane | SUN PRAIRIE | 2850 HOEPKER ROAD | 53590 | 608-825-4011 | 1121 | Costco |
| DUNN | MENOMONEE FALLS | 9235 PERSHING AVE | 53051 | 262-946-6070 | 1209 | Costco |
| KENOSHA | PLEASANT PRAIRIE | 7707 94TH AVE | 53158 | 262-597-1037 | 1198 | Costco |
| OUTAGAME | GRAND CHUTE | 5401 W INTEGRITY WAY | 54913 | 920-363-7010 | 1222 | Costco |
| OZAUKEE | GRAFTON | 950 PORT WASHINGTON ROAD | 53024 | 262-204-1059 | 628 | Costco |
| WAUKESHA | NEW BERLIN | 15300 W GRANGE AVE | 53151 | 262-599-7040 | 1212 | Costco |
| Waukesha | PEWAUKEE | 443 PEWAUKEE ROAD | 53072 | 262-956-6701 | 1101 | Costco |