Montorio nei Frentani

{{Infobox Italian comune

| name = Montorio nei Frentani

| official_name = Comune di Montorio nei Frentani

| native_name =

| image_skyline = Montorio nei Frentani -panorama (cropped).jpg

| imagesize =

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| image_caption = Panorama of Montorio nei Frentani

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| coordinates = {{coord|41|45|N|14|56|E|region:IT|display=inline,title}}

| coordinates_footnotes =

| region = {{RegioneIT|sigla=MOL}}

| province = {{ProvinciaIT (short form)|sigla=CB}} (CB)

| frazioni =

| mayor_party =

| mayor = Pellegrino Nino Ponte

| area_footnotes =

| area_total_km2 = 31

| population_footnotes = All demographics and other statistics from the Italian statistical institute (Istat)

| population_total = 407

| population_as_of = 30 November 2017

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| population_demonym = Montoriesi

| elevation_footnotes =

| elevation_min_m =

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| elevation_m = 654

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| postal_code = 86040

| area_code = 0874

| website = {{official website|http://www.comune.montorioneifrentani.cb.it}}

| footnotes =

}}

Montorio nei Frentani (Campobassan dialect: Mundòrj) is a small town and comune in the province of Campobasso (Molise), in Southern Italy.