This is not a complete list of journals that cover the voice, opera and singing. You will want to check the A to Z listing of journals. You can search by title to locate the journals.
1. American Choral Review
2. Cambridge Opera Journal
3. Choir and Organ
4. Folk Music Journal
5. International Journal of Search in Choral Singing
6. Journal of Singing
7. Journal of Voice
8. Lied und populäre kultur : jarbuch des deutschen volksliedarchives Freiberg
9. Opera Canada
10. Opera News
11. Opera Quarterly
12. Senza Sordino
13. Sing Out
14. State Songs
You can also browse the journal by the subject of music.