Gelsa
municipality
Flag Coat of arms
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Coordinates: 41°24′N 0°27′W / 41.400°N 0.450°W / 41.400; -0.450
Country	Spain
Autonomous community	Aragon
Province	Zaragoza
Area
• Total	72 km2 (28 sq mi)
Population  (2018)[1]
• Total	995
• Density	14/km2 (36/sq mi)
Time zone	UTC+1 (CET)
• Summer (DST)	UTC+2 (CEST)

Gelsa is a municipality located in the province of Zaragoza, comarca (county) of Ribera Baja del Ebro, Aragon, Spain. According to the 2004 census (INE), the municipality has a population of 1,216 inhabitants.