Y101

Y101 may refer to one of the following radio stations:


 * KRRY, of Quincy, Illinois
 * KWYE, of Fresno, California
 * WHYA, of Cape Cod, Massachusetts
 * WYOY, of Jackson, Mississippi
 * CKBY-FM, of Smiths Falls and Ottawa, Ontario, identified as Y101 from 2004–2013
 * DYIO, of Cebu City, Philippines

Y101 may also refer to:
 * Yttrium-101 (Y-101 or 101Y), an isotope of yttrium