Jacnia

{{Infobox settlement

| name = Jacnia

| settlement_type = Village

| total_type =

| image_flag =

| image_shield =

| image_map =

| subdivision_type = Country

| subdivision_name = {{POL}}

| subdivision_type1 = Voivodeship

| subdivision_name1 = Lublin

| subdivision_type2 = County

| subdivision_name2 = Zamość

| subdivision_type3 = Gmina

| subdivision_name3 = Adamów

| coordinates = {{coord|50|34|26|N|23|10|23|E|region:PL|display=title,inline}}

| pushpin_map = Poland

| pushpin_label_position = bottom

| elevation_m =

| population_total = 560

| website =

}}

Jacnia {{IPAc-pl|'|j|a|c|ń|a}} is a village in the administrative district of Gmina Adamów, within Zamość County, Lublin Voivodeship, in eastern Poland.{{TERYT}} It lies approximately {{convert|3|km|mi|0|abbr=on}} south-east of Adamów, {{convert|18|km|mi|0|abbr=on}} south of Zamość, and {{convert|86|km|mi|0|abbr=on}} south-east of the regional capital Lublin.