1970–71 Eastern Counties Football League

The 1970–71 Eastern Counties Football League was the 29th season in the history of the Eastern Counties Football League.

Two new clubs joined the league this season:
 * Braintree & Crittall, transferred from the Metropolitan League.
 * Wisbech Town, transferred from the Southern Football League.

Lowestoft Town were champions, winning their ninth Eastern Counties Football League title.