Giovanni Stefano Ajazza

{{Short description|Roman Catholic prelate}}

{{Infobox Christian leader

| type = Bishop

| honorific-prefix = Most Reverend

| name = Giovanni Stefano Ajazza

| title = Bishop of Asti

| image =

| alt =

| caption =

| church = Catholic Church

| archdiocese =

| diocese = Diocese of Asti

| see =

| term = 1596–1618

| predecessor = Caesar Benzio

| successor = Isidoro Pentorio

| ordination =

| ordained_by =

| consecration =

| consecrated_by =

| cardinal =

| rank =

| birth_date = 1550

| birth_place =

| death_date = 1618 (age 68)

| death_place = Asti, Italy

| previous_post =

| nationality =

}}

Giovanni Stefano Ajazza or Giovanni Stefano Agathia or Giovanni Stefano Aiazza (1550–1618) was a Roman Catholic prelate who served as Bishop of Asti (1596–1618).{{cite book|url=http://sul-derivatives.stanford.edu/derivative?CSNID=00002719&mediaType=application/pdf|last1=Gauchat|first1=Patritius (Patrice)|title=HIERARCHIA CATHOLICA MEDII ET RECENTIORIS AEVI Vol IV|pages=98|publisher=|date=|ISBN=|access-date=2022-04-03|archive-date=2018-10-04|archive-url=https://web.archive.org/web/20181004040718/http://sul-derivatives.stanford.edu/derivative?CSNID=00002719&mediaType=application%2Fpdf|url-status=dead}}