The 2003 Junior League World Series took place from August 10–16 in Taylor, Michigan, United States. La Mirada, California defeated Santiago, Panama in the championship game.

United States	International
Urbandale, Iowa Urbandale Central	Saipan, Northern Mariana Islands Saipan Asia-Pacific
Mansfield, Massachusetts Mansfield East	Surrey, British Columbia Whalley Canada
Bridgewater, Virginia Bridgewater South	Moscow, Russia Khovrino Europe
Sugar Land, Texas West Sugar Land Southwest	Santiago, Panama Activo Latin America
La Mirada, California La Mirada West

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United States Pool

Team W L Rs Ra Virginia 4 0 17 6 California 3 1 26 5 Texas 2 2 20 22 Massachusetts 1 3 7 24 Iowa 0 4 13 31

California – 1–0 10–0 14–0 1–5 Iowa 0–1 – 4–5 5–18 4–7 Massachusetts 0–10 5–4 – 1–2 1–8 Texas 0–14 18–5 2–1 – 0–2 Virginia 5–1 7–4 8–1 2–0 –

International Pool

Team W L Rs Ra Canada 3 0 29 8 Panama 2 1 20 10 Russia 1 2 11 17 Northern Mariana Islands 0 3 0 25

Canada – 10–0 10–7 9–1 Northern Mariana Islands 0–10 – 0–5 0–10 Panama 7–10 5–0 – 8–0 Russia 1–9 10–0 0–8 –

Elimination Round

	Semifinals					World Championship
	4–0	Virginia	5
	3–1	California	8
						4–1	California	8
						3–1	Panama	7
	3–0	Canada	2
	2–1	Panama	11

2003 Junior League World Series Champions
La Mirada LL La Mirada, California