Lün

{{Infobox settlement

|name = Lün District

|native_name = Лүн сум
{{lower|0.2em|{{MongolUnicode|ᠯᠦᠩ}}{{MongolUnicode|ᠰᠤᠮᠤ}}}}

|native_name_lang = mn

|settlement_type = District

|nickname =

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|image_map = Tov Lun sum map.PNG

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|subdivision_type = Country

|subdivision_name = Mongolia

|subdivision_type1 = Province

|subdivision_name1 = Töv Province

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|timezone = UTC + 8

|utc_offset = +8

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}}

Lün ({{langx|mn|Лүн}}) is a sum of Töv Province in Mongolia. The Tuul River passes just west of the sum center.