Elhovo (, from the Bulgarian word for " alder" and the placename suffix " -ovo") is a Bulgarian town in Yambol Province, located on the left bank of the Tundzha river, between Strandzha and Sakar mountains. Second largest city in the region after Jambol, the city is located at 36 km from border checkpoint Lesovo – Hamzabeyli on the Bulgarian – Turkish border. Elhovo is the administrative center of Elhovo municipality, which includes 21 villages (municipalities). The city's population to December 15, 2014 is 10 424 inhabitants.
During the Ottoman rule it was known as Kızılağaç, also meaning "alder".