| Tournament details | |
|---|---|
| Dates | August 22–August 27 |
| Teams | 8 |
| Final positions | |
| Champions |   Westbury American Little LeagueHouston, Texas |
| Runner-up |  American Little LeagueWest New York, New Jersey |
The 1966 Little League World Series took place between August 22 and August 27 in 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.
| United States | International |
|---|---|
 Kankakee, IllinoisCentral Region Kankakee Jaycee Little League |
  Windsor, OntarioCanada Region Windsor Central Little League |
| West New York, New Jersey East Region American Little League |
 Rhein-Main, West GermanyEurope Region Rhein-Main Little League |
| Houston, Texas South 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 |
| 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 | |||||||||
| 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 |