| Location: | Livermore, California |
| Start Date: | July 29 |
| End Date: | August 5 |
| Champion: | -->  Seoul, South Korea |
| Runner-Up1: | --> Livermore, California |
| Runner-Up2: | --> |
| Previous: | 2017 |
| Next: | 2019 |
The 2018 Intermediate League World Series took place from July 29–August 5 in Livermore, California. Seoul, South Korea defeated host Livermore, California in the championship game.
The debut of the Australia Region raised the total number of teams to 12.
| United States | International | |
|---|---|---|
| Livermore, California District 57 (Livermore/Granada) Host | Seoul, South Korea West Seoul Asia–Pacific | |
| Ankeny, Iowa Ankeny National Central |  Perth, Western AustraliaPerth Metro North Australia | |
| Commack, New York Commack North East |  Coquitlam/Surrey, British ColumbiaCoquitlam/Whalley Canada | |
| Boynton Beach, Florida West Boynton Beach Southeast |  Brno, Czech RepublicSouth Czech Republic Europe–Africa | |
| Midland, West Texas Mid-City Southwest |  Reynosa, MexicoGuadalupe Treviño Kelly Latin America | |
| San Diego, Southern California Scripps Ranch West | Guayama, Puerto Rico Radames Lopez Puerto Rico |
United States Bracket
International Bracket
Consolation Round
Elimination Round