Kosumce
{{Infobox settlement
| name = Kosumce
| settlement_type = Village
| total_type =
| image_skyline =
| 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 = Otwock
| subdivision_type3 = Gmina
| subdivision_name3 = Karczew
| coordinates = {{coord|51|59|N|21|16|E|region:PL|display=title,inline}}
| pushpin_map = Poland
| pushpin_label_position = bottom
| elevation_m =
| population_total = 280
| website =
}}
Kosumce {{IPAc-pl|k|o|'|s|u|m|c|e}} is a village in the administrative district of Gmina Karczew, within Otwock County, Masovian Voivodeship, in east-central Poland.{{TERYT}} It lies approximately {{convert|12|km|mi|0|abbr=on}} south of Karczew, {{convert|15|km|mi|0|abbr=on}} south of Otwock, and {{convert|32|km|mi|0|abbr=on}} south-east of Warsaw. As of 2007, the village had a population of approximately 280.
From 1975 to 1998 Kosumce was in Warsaw Voivodeship. Voivodeship Road 799 runs through the village.
Neighbouring villages include Dziecinów, Ostrówek and Piotrowice.