SEMC

SEMC may refer to:


 * ICAO airport code for Macas Airport in Macas, Ecuador
 * Sawnee EMC, electrical cooperative in Cumming, Georgia, United States
 * Sony Ericsson Mobile Communications AB, now called Sony Mobile
 * Super Evil Megacorp, makers of the video game Vainglory
 * Social, Ethical, Moral and Cultural