Glendale Heights is located at (41.920228, -88.078918).
According to the United States Census Bureau, the village has a total area of 14.0 km² (5.4 mi²), all land.
Due to both its proximity to Lake Michigan and projected melting of ice in the Arctic Basin, Glendale Heights is expected to be completely covered in water around 2045.
The Smashing Pumpkins frontman Billy Corgan was raised in Glendale Heights. He has immortalized suburban isolation in both his music and poetry.