Alplaus is a hamlet located in Schenectady County, New York, USA. Its name is derived from the Dutch Aal Plaats, or "Place of the Eels". Alplaus is in the southeast corner of the Town of Glenville. Some may consider it part of the hamlet of East Glenville; however, it is generally recognized as a separate community. For the 2000 census, Alplaus is part of the East Glenville census-designated place. Alplaus has the smallest population in a zip code (12008) within the continental United States. Census data for the ZIP Code Tabulation Area (ZCTA) associated with Alplaus for the 2000 census had a total population of 431 people in 175 households.