By 1893, the Santa Fe, Prescott and Phoenix Railway passed within three miles of the mine, at Congress Junction.

Congress boomed, and remained prosperous until the mid-1930s, when the mines closed.

[3] The post office moved to Congress Junction in 1938, where it remains.

There were 1,166 housing units at an average density of 30.9 per square mile.

[9] Students attended Wickenburg USD for all grade levels prior to 2001, when the Congress K-8 facility opened.

[10] The Congress Post Office, of the United States Postal Service, opened in 2001.