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.

Quick Facts Tournament information, Location ...

2018 Intermediate League World Series

Tournament information
Location	Livermore, California
Dates	July 29–August 5
Final positions
Champions	Seoul, South Korea
Runner-up	Livermore, California
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The debut of the Australia Region raised the total number of teams to 12.

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United States Bracket

	—					—					—					United States Championship
						1–0	California	1
	—	California	7			—	Florida	5
	—	Iowa	0								1–0	Florida (F/8)	10
											2–0	Texas	9
						1–0	Texas (F/5)	19
	—	Texas	4			—	New York	0
	—	Host	0
																2–0	Florida	1
																3–1	Host	5
	Lower round 1					Lower round 2					Lower final
	0–1	Iowa	9
											2–1	Texas	5
	0–1	New York	3
						1–1	Iowa	5			2–1	Host	13
						1–1	Host	11
	1–1	California	2
	0–1	Host	7

International Bracket

	—					—					—					International Championship
						1–0	Mexico	2
	—	Czech Republic	1			—	Puerto Rico	1
	—	Mexico	8								2–0	Mexico	2
											2–0	South Korea (F/5)	13
						1–0	South Korea (F/4)	23
	—	South Korea (F/4)	19			—	Canada	0
	—	Australia	0
																3–0	South Korea (F/5)	14
																3–1	Puerto Rico	3
	Lower round 1					Lower round 2					Lower final
	0–1	Czech Republic	4
											2–1	Mexico	1
	0–1	Canada	5
						1–1	Canada	1			2–1	Puerto Rico (F/8)	2
						1–1	Puerto Rico	8
	0–1	Puerto Rico (F/5)	11
	0–1	Australia	0

Consolation Round

	—
	0–2	New York (F/5)	12
	0–2	Australia	1

	—
	1–2	California (F/5)	13
	0–2	Czech Republic	2

Elimination Round

	Semifinals					World Championship
	2–0	Florida	1
	3–1	Host	5
						4–1	Host	0
						4–0	South Korea	10
	3–0	South Korea (F/5)	14
	3–1	Puerto Rico	3