Kosemin

{{Infobox settlement

| name = Kosemin

| settlement_type = Village

| total_type =  

| image_skyline = Kosemin - wiatrak 01.JPG

| image_caption =

| image_flag =

| image_shield =

| image_map =

| subdivision_type = Country

| subdivision_name = {{POL}}

| subdivision_type1 = Voivodeship

| subdivision_name1 = Masovian

| subdivision_type2 = County

| subdivision_name2 = Sierpc

| subdivision_type3 = Gmina

| subdivision_name3 = Zawidz

| coordinates = {{coord|52|51|45|N|19|53|28|E|region:PL|display=title,inline}}

| pushpin_map = Poland

| pushpin_label_position = bottom

| elevation_m =

| population_total = 290

| website =

}}

Kosemin {{IPAc-pl|k|o|'|s|e|m|i|n}} is a village in the administrative district of Gmina Zawidz, within Sierpc County, Masovian Voivodeship, in east-central Poland.{{TERYT}} It lies approximately {{convert|6|km|mi|0|abbr=on}} north of Zawidz, {{convert|16|km|mi|0|abbr=on}} east of Sierpc, and {{convert|104|km|mi|0|abbr=on}} north-west of Warsaw.