Some trains of the Echigo Tokimeki Railway Nihonkai Hisui Line terminate at Etchū-Miyazaki Station rather than neighbouring Ichiburi.

Etchū-Miyazaki Station has one island platform connected by a footbridge.

It was privatized on 1 April 1984, becoming a station on JR West.

From 14 March 2015, with the opening of the Hokuriku Shinkansen extension from Nagano to Kanazawa, local passenger operations over sections of the former Hokuriku Main Line running roughly parallel to the new shinkansen line were reassigned to different third-sector railway operating companies.

[1] From this date, Etchū-Miyazaki Station was transferred to the ownership of the third-sector operating company Ainokaze Toyama Railway.