Nasty is a hamlet in the East Hertfordshire district of Hertfordshire, England. It is in Great Munden civil parish, around 6 miles (10 km) north of Ware and around 7.5 miles (12 km) east of Stevenage. At the 2011 census the population was included in the civil parish of Albury.
Steen Cottage in Nasty
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Its name comes from the Anglo-Saxon æt þǽm éastan hæge, meaning "at the eastern hedged enclosure" or similar.