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The earliest references to Ahja estate (German: Aya) are from 1553. It belonged to the Oxenstierna family in the 17th century but was later taken over by the Swedish state through one of the so-called reductions.
In 1716, it was given to Christina Glück, the widow of Johann Ernst Glück, in whose family the future Catherine I of Russia grew up. The present two-storey, Baroque style building with a pavilion-shaped main entrance dates from the period of ownership of François Guillemot de Villebois, who was the son-in-law of Christina Glück. The building was completed around 1749, probably built by master builders from St. Petersburg.
In 1770, Jakob Michael Reinhold Lenz became for two years the manager of the estate. Later, it belonged to various Baltic German families. One of these was the von Brasch, who built a burial chapel, still standing, for their family members in the manor park.
- Signy Aarna (born 1990), football player
- Andrus Murumets (born 1978), strongman
- Friedebert Tuglas (1886–1971), writer
- "NGA GeoNames Database". National Geospatial-Intelligence Agency. Retrieved 2008-07-09.
- Spotting History. "Ahja Manor". SpottingHistory.com. Retrieved 30 December 2012.
- Sakk, Ivar (2004). Estonian Manors - A Travelogue. Tallinn: Sakk & Sakk OÜ. p. 228. ISBN 9949-10-117-4.
- Hein, Ants (2009). Eesti Mõisad - Herrenhäuser in Estland - Estonian Manor Houses. Tallinn: Tänapäev. p. 155. ISBN 978-9985-62-765-5.
- Ahja manor at Estonian Manors Portal