Abel Costas Montaño

{{short description|20th and 21st-century Bolivian Catholic bishop}}

{{family name hatnote|Costas|Montaño|lang=Spanish}}

{{Infobox Christian leader

| type = Bishop

| honorific-prefix = His Excellency

| name = Abel Costas Montaño

| title = Bishop Emeritus of Tarija

| image =

| alt =

| caption =

| church = Roman Catholic Church

| see = Diocese of Tarija

| term = 1974–1995

| term_end = 20 October 1995

| predecessor = Juan Niccolai

| successor = Adhemar Esquivel Kohenque

| ordination = 22 September 1945

| ordinated_by =

| consecration = 6 January 1969

| consecrated_by = Paul VI

| rank =

| birth_date = {{birth date|1920|5|25}}

| birth_place = Pocona, Bolivia

| death_date = {{death date and age|2015|2|11|1920|5|25}}

| death_place = Cercado, Bolivia

| previous_post = Auxiliary Bishop of Cochabamba (1968-1974)

| nationality = Bolivian

}}

Abel Costas Montaño (May 25, 1920 – February 11, 2015) was a Bolivian prelate of the Roman Catholic Church.

Costas Montaño was born in Pocona, Bolivia and was ordained a priest on September 22, 1945. He was appointed auxiliary archbishop of the Archdiocese of Cochabamba on November 11, 1968, as well as titular bishop of Novi, and was ordained bishop on January 6, 1969. Montaño was appointed Bishop of the Diocese of Tarija on December 11, 1974, where he would serve until his retirement on October 20, 1995.