Roman Catholic Diocese of San Martín in Argentina

{{Short description|Catholic ecclesiastical territory}}

{{Infobox diocese

| jurisdiction = Diocese

| name = San Martín

| latin = Dioecesis Foromartiniensis

| local = Diócesis de San Martín

| image = Catedraldesanmartin.JPG

| image_size = frameless

| image_alt =

| caption = Cathedral of Jesus the Shepherd

| country = Argentina

| metropolitan = Buenos Aires

| territory =

| province = Buenos Aires

| coordinates =

| area_km2 = 102

| population = 769,000

| population_as_of = 2010

| catholics = 538,000

| catholics_percent = 70

| parishes = 37

| churches =

| congregations =

| schools =

| members =

| denomination = Roman Catholic

| rite = Roman Rite

| established = 10 April 1961 ({{age|1961|4|10}} years ago)

| cathedral = Cathedral of Christ the Good Shepherd in San Martín

| cocathedral =

| patron = St Joseph the Worker
Our Lady of Lourdes

| priests =

| pope = {{Incumbent pope}}

| bishop_title = Bishop

| bishop = Martín Fassi

| metro_archbishop = Mario Aurelio Poli

| coadjutor =

| auxiliary_bishops = Ham Lim Moon

| vicar_general =

| emeritus_bishops =

| map =

| map_alt =

| map_caption =

| website =

| footnotes =

}}

The Roman Catholic Diocese of San Martín is located in the city of San Martín, Buenos Aires, Argentina. It was established by Saint John XXIII on 10 April 1961.