No photograph
on file
Est. 1900
Photo: Via source (attribution on file page)
Haunted House / Historic Home

Allerton Mansion

Georgian Revival Estate and Retreat Center

515 Old Timber Road, Monticello, IL 61856

Wheelchair Accessible Research-Backed · 2 sources

Research updated May 2026

Age

All Ages

Cost

Free

Park grounds are free to visit (donations welcomed). Public Mansion tours are $15 per person; overnight stays and event bookings are priced separately on the venue website.

Access

Wheelchair OK

Paved walkways through formal gardens, mixed gravel and grass paths in outlying areas

Equipment

Photos OK

ApparitionsPhantom footstepsEVPResidual haunting

The most persistent paranormal report at Allerton Mansion concerns a woman in white. Witnesses describe seeing her in one of the upstairs guest rooms, where she is said to appear at a dressing table putting on hats and gloves, and pacing the hallway in front of the same room. The figure has also been reported walking the path beside the reflecting pond at the rear of the mansion, and footsteps without a visible source have been heard descending the staircase.

Local tradition links the apparition to a guest who frequently stayed at The Farms during Robert Allerton's tenure. Two candidates surface most often in retellings: Agnes Allerton, a relative who spent extended periods at the estate, and the American portrait painter Ellen Emmet Rand, who was associated with Allerton in the early 20th century. No documentation conclusively identifies the figure, and the lore appears to derive primarily from staff and visitor reports collected after the property became a public retreat center.

In April 2019, the Ghost Research Society and Afterlife Tours, Inc. conducted an overnight investigation in the mansion. Investigators set up sessions in the Ballroom, the Library, and an upstairs guest room they identified as Room 6, using EVP recorders, an Ovilus device, and a Phasma Box. The team reported responses on the spirit-communication devices and what they characterized as disembodied voices, though no audio or video evidence has been independently verified.

Guests staying overnight in the mansion occasionally describe a sense of presence in the upstairs corridors after the building has settled for the night. Daytime visitors most often note an atmospheric heaviness in the gardens at the back of the house, near the reflecting pond where the Lady in White is most frequently described.

Notable Entities

Lady in White

Plan Your Visit

2 ways to experience
Guided Tour

Public Mansion Tour

Park grounds, formal gardens, and reflecting ponds are free to visit daily on your own. Seeing inside the 30,000-square-foot Georgian Revival mansion requires a scheduled Public Mansion Tour: about 60 minutes, primarily the first floor, $15 per person, meeting in the Mansion Gallery. The grounds include outdoor sculpture installations curated by Robert Allerton during his 47 years on the estate.

Duration:
1 hr
Days:
Park grounds open daily; Mansion tours held on select scheduled dates throughout the year
Get directions
Overnight Stay Booking Required

Overnight Stay at the Mansion or Cottage

Book one of the estate's 33 guest rooms, 17 of them in the Mansion and the rest in surrounding lodgings, including the House in the Woods, Gate House, and Evergreen Lodge. Guests have reported seeing a woman in white walking the upstairs hallway and the path beside the reflecting pond.

Find a place to stay near Allerton Mansion

Lodging nearby

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Sources & Further Reading

Every HauntBound history is researched from documented sources. We clearly separate verified historical fact from paranormal folklore.

  1. 1.en.wikipedia.org/wiki/Robert_Allerton_Park
  2. 2.allerton.illinois.edu

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Frequently Asked Questions

Is Allerton Mansion family-friendly?
The estate is a popular family destination centered on formal gardens, woodland sculpture trails, and a historic mansion. Paranormal lore is incidental rather than the primary draw. Overall family fit: High.
How much does it cost to visit Allerton Mansion?
Park grounds are free to visit (donations welcomed). Public Mansion tours are $15 per person; overnight stays and event bookings are priced separately on the venue website. This location is free to visit.
Do I need to book in advance?
No advance booking is required, but checking availability is recommended.
Is Allerton Mansion wheelchair accessible?
Yes, Allerton Mansion is wheelchair accessible. Terrain: Paved walkways through formal gardens, mixed gravel and grass paths in outlying areas.