Lower Ancyle or Ankyle Hypenerthen () was the name of a deme of ancient Attica. It was located east of Athens and bordering Agryle to the south.IG II² 2776. Upper Ancyle passed from the phyle Aigeis to Antigonis in 307/306 BCE; Lower Ancyle remained in the Aigeis phyle.IG II² 2362.

In the 3rd century, in Roman times, the demoi were home to rich landed properties. Their name derives from the Greek name for "javelin" (which was thrown with a rope). The same root also appears in an epithet attributed to Cronus and to Prometheus, "of sharp wits".

The site of Lower Ancyle is located northeast of modern Ardettos.

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