74820 is zip code located in Ada, Oklahoma. The population is 31,144, making 74820 the largest zipcode in Ada and the largest in Pontotoc County.
There are 16 public schools in 74820 with an average Homefacts rating of B+. The total crime rate for Ada is high , and there are 73 registered sex offenders residing in the zip code 74820. Unemployment in 74820 is moderate.