Șercaia (German: Schirkanyen; Hungarian: Sárkány; Turkish: Saruhan) is a commune in Brașov County, Transylvania, Romania. It is composed of three villages: Hălmeag (Halmagen; Halmágy; Halmaç), Șercaia and Vad (Waadt, Waden; Vád). The Hungarian name means "dragon".

The commune is located in the Burzenland ethnographic area, in the central part of the county, 14 km (8.7 mi) east of Făgăraș and 53 km (33 mi) northwest of the county seat, Brașov. The river Șercaia (a left affluent of the Olt) flows south to north through the commune.

Șercaia is situated on European route E68, which connects Brașov to Szeged in Hungary. National Road DN73A runs from Predeal to Șercaia, going along the way through the towns of Râșnov and Zărnești.

The commune also has a small train station that serves the CFR Line 200, which runs from Brașov to Curtici, on the Hungarian border.

At the 2011 census, 84% of inhabitants were Romanians, 10.6% Hungarians, 3.7% Roma and 0.8% Germans.

• Augustin Bunea (1857–1909), priest and historian
• Alexandru Ciurcu (1854–1922), inventor
• Katalin Varga (1802–aft. 1852), leader of the Transylvanian Miners' Movement

• Coles, John; Harding, A. F. (1979). The Bronze Age in Europe. Routledge. ISBN 978-0-416-70650-5.
• Popescu, Dorin (1956). "Cercetări arheologice în Transilvania". Materiale și cercetāri arheologice (in Romanian). Institutul de Arheologie, Bucharest, Romania. ISSN 1220-5222.