Avondale House, in Avondale, County Wicklow, Ireland, is the birthplace and home of Charles Stewart Parnell (1846–1891) one of the leading political leaders in Irish history. It is set in the Avondale Forest Park in over 2 km² (500 acres) of land, approximately 1.5km from the nearby town of Rathdrum. The river Avonmore flows through the park on its way towards the Irish Sea.
The house is Georgian, probably designed by James Wyatt and built in 1777. It is notable for its fine plasterwork and still contains many original pieces of furniture. The American Room is dedicated to Admiral Charles Stewart (1778-1869), Parnell's American grandfather who commanded the USS Constitution (now moored in Boston Harbor) during the War of 1812.
The house is open to visitors, who are introduced to the house by an audio visual presentation. Other facilities include a restaurant, book shop, picnic areas, children's play area, two orienteering courses and large car/coach park. In the surrounding parkland are tree trails and walks ranging in duration from one to five hours.
Avondale House was built in 1777 for Samuel Hayes, a barrister who wrote a book on Irish Forestry and was a pioneer of the re-afforestation of Ireland, planting many thousands of trees on the estate. He bequeathed it to his friend and fellow MP Sir John Parnell in 1795 and the latter's great-grandson Charles Stewart Parnell was born there in 1846.  After Parnell's death in 1891 the estate was sold to a Dublin butcher who felled most of the trees to recoup his investment.
The woodlands were renewed in 1904 when the estate was sold to the government. The house was used as a forestry school and the grounds planted with a great variety of trees, the most successful being conifers from the Pacific coast of North America. The grounds now boast specimens of giant redwoods from California and Sitka spruce from British Columbia. 
The outside of the house is featured in a painting in the R. Barry O'Brien 1898 biography of Parnell.
- "Avondale House and Forest". Retrieved 2012-12-16.
- Ireland of the Welcomes. July-August 2004.
- O'Brien, R. Barry. The Life of Charles Stewart Parnell 1846-1891, Vols. I&II, Harper And Brothers, New York, 1898 (Vol.II contains the sketch of Avondale); reprinted in paperback i.a. by BiblioBazaar, 2009, ISBN 978-1-113-79910-4