Dimlands, also known as Dimland Castle, was a small-scale Tudor-style gentry house built in 1799 near Llantwit Major in the Vale of Glamorgan, Wales. Constructed on land that previously held the fortress of Iestyn ap Gwrgant, the main house was demolished after a fire in 1948, but its castellated lodge survives as a Grade II listed building. The site was inhabited by the Nicholl family, who developed extensive gardens including an orchard that cultivated 27 varieties of pear by 1860.