Many GPS devices will send you to the subdivision next to Mt. Cuba.  If you arrive at a fancy iron gate, you are one driveway away from the observatory.

FOR PROGRAMS AND EVENTS:  Please do not arrive more than 15 minutes before the event time.  The gate will be closed, and parking along Hillside Mill Road is illegal.  If the gate is closed, please drive around the block and try again.

Mt. Cuba Astronomical Observatory

Mailing address:

1610 Hillside Mill Road

Wilmington, DE  19807

Phone: 302-654-6407


Office Hours:  9 am - 1 pm Monday - Friday

Get In Touch




TTo use this email address, replace .at. with @

1610 Hillside Mill Road

Wilmington, DE

(302) 654-6407

Office Hours: Monday-Friday 9 AM - 1 PM