The 1966 Little League World Series took place between August 22 and August 27 in South Williamsport, Pennsylvania. Westbury American Little League of Houston, Texas, defeated American Little League of West New York, New Jersey, in the championship game of the 20th Little League World Series.
Teams
| United States | International |
|---|---|
 Kankakee, IllinoisCentral Region Kankakee Jaycee Little League |
  Windsor, OntarioCanada Region Windsor Central Little League |
 West New York, New JerseyEast Region American Little League |
 Rhein-Main, West GermanyEurope Region Rhein-Main Little League |
 Houston, TexasSouth Region Westbury American Little League |
 Wakayama, JapanFar East Region Wakayama Little League |
 Sacramento, CaliforniaWest Region Airport Little League |
  Monterrey, Nuevo León, MexicoLatin America Region Cuauhtemoc Little League |
Winners bracket
| Quarter-finals | Semi-finals | Final | ||||||||
| California | 3 | |||||||||
| Canada | 1 | |||||||||
| California | 0 | |||||||||
| Texas | 4 | |||||||||
| Texas | 6 | |||||||||
| Mexico | 0 | |||||||||
| Texas | 8 | |||||||||
| New Jersey | 2 | |||||||||
| Illinois | 1 | |||||||||
| New Jersey | 3 | |||||||||
| New Jersey | 4 | |||||||||
| Japan | 0 | Third place | ||||||||
| Japan (F/8) | 6 | |||||||||
| West Germany | 2 | |||||||||
| California | 6 | |||||||||
| Japan | 0 | |||||||||
Consolation bracket
| Games A & B | Game D | |||||
| Canada | 7 | |||||
| Mexico | 8 | |||||
| Mexico | 1 | |||||
| Illinois | 2 | |||||
| Illinois | 6 | |||||
| West Germany | 3 | |||||
| Game C | ||||||
| Canada | 1 | |||||
| West Germany | 4 | |||||
| 1966 Little League World Series Champions |
|---|
  Westbury American Little League Houston, Texas |
