The Lahaina Banyan Tree is a banyan tree (Ficus benghalensis; known in Hawaiian as paniana) in Maui, Hawaii, United States. A gift from missionaries in India, the tree was planted in Lahaina on April 24, 1873, to mark the 50th anniversary of the arrival of first American Protestant mission. Covering 1.94 acres, the tree resides in Lahaina Banyan Court Park. A mere 8 feet (2.4 m) when planted, it grew to a height of about 60 feet (18 m) and rooted into 16 major trunks, apart from the main trunk, with the canopy spread over an area of about 0.66 acres (0.27 ha). It is considered the largest banyan tree in the state and the country. In April 2023, Lahaina held a birthday party to celebrate the Banyan Tree’s planting 150 years ago.

The 2023 Hawaii wildfires destroyed the town of Lahaina and severely damaged the tree. Disaster recovery efforts took place to determine the scope of the damage and to determine if the tree could be salvaged and restored. After fully examining the tree, arborists believe it has a reasonable chance of regeneration. To improve its chances, they have implemented a regimen of irrigation, compost, and soil aeration, with results expected in three to six months.

The banyan tree is located close to the port in the historical Lahaina town, which was the former capital of Hawaii. It is the oldest banyan tree in Hawaii.

The banyan tree, received as a gift by the Smith family in the 1870s, was planted on April 24, 1873, at Lahaina by William Owen Smith, the then sheriff of Lahaina. The tree was planted to mark the 50th anniversary of the arrival of the first Protestant mission in Maui; the mission had been invited to Maui by Queen Keōpūolani, wife of late King Kamehameha. Its extensive trunk and aerial root system covered 0.66 acres (0.27 ha), located in the Courthouse Square, which is renamed as the Banyan Tree Park covering 1.94 acres. It is not only the largest in Hawaii but also in the United States. The park is managed by the County of Maui and the Lahaina Restoration Foundation.

According to reports a royal ball was held under the tree in 1886 for King Kamehameha III on his birthday.

The Aloha Festivals Week has been held under this tree. The shade of the tree is used to shade vendors who hold events approximately 36 weekends per year. At sunset, there is a riot of noise as the birds fly back into the tree to find the best branch to sleep on. There used to be a canal of water down one side of the tree, and even though the canal is now a street, it is still thought to be a source of water for the tree roots.

Aerial roots help support the tree's huge limbs. To encourage the roots to reach the ground faster, there were mayonnaise jars filled with water and tied to hang just below the roots. The roots wanted the water and it was thought that they did grow faster. Despite it appearing as many trees, it is actually one tree with many limbs that have grown together.

The tree was seriously damaged when a series of wildfires broke out on the island of Maui in early August 2023. The wind-driven fires prompted evacuations, caused widespread damage, and killed nearly a hundred people in the town of Lahaina. The proliferation of the wildfires was attributed to dry, gusty conditions created by a strong high-pressure area north of Hawaii and Hurricane Dora to the south.

Consulting Arborist Steve Nimz is monitoring the burned tree for signs of rehabilitation and renewed health. After the wildfire, a full inspection of the tree was completed, comprising the aerial roots and beneath the bark. Nimz discovered that the main trunks have live tissue, which is considered a good indicator of regeneration. He expects the wait and see period to last anywhere from three to six months. Current restoration efforts include a daily watering program provided by water trucks with hoses, and the addition of a two-inch layer of compost and soil aeration. "Normally if you touch or cut into a banyan tree, you’re just going to see that sap oozing out really fast," Nimz told The Maui News. "There was sap where I cut in on the top and all these areas, but it wasn’t proliferous like it would be on a really healthy tree. But it’s there. What I am saying is that these trees are resilient. With everybody’s love and everybody here, we want to see the tree make it. It’s up to the tree right now."

On September 19, the Hawaii Department of Land and Natural Resources reported a fresh sprout of leaves out of the tree, indicating the first signs of possible recovery. In November 2023 it was reported by arborists that while part of the tree only had high heat from the flames, which killed the leaves and not the branches or trunk about 15-20% of the tree was too badly burned and would need to be trimmed back. Stepping stones around the base of the tree were removed to allow more nutrients to penetrate the soil and fifteen solar powered sensors were attached to the tree in order to monitor it.

In March 2024, roughly a third of the tree was removed. These dead portions were removed in order to encourage the tree to redirect its healing efforts towards the portions of the tree that were recovering. In addition, efforts were underway to eventually restore the original footprint of the tree via air layering.

The banyan tree or Ficus benghalensis is from India, and it is known for unusual growth of its roots. The roots descend or sprout from the branches into aerial roots towards the ground where they form new trunks. This results in the growth of many trunks around the main trunk. The banyan, native to India, is one of 60 types (out of reported 1,000 species in the world) of fig trees found throughout Hawaii. The trees are tall and “grow into mazes of additional trunks” and in Lahaina the tree covers an area of over half an acre. The banyan tree in Lahaina, when planted, was a sapling of 8 feet (2.4 m) height. Over the years it has grown to a height of over 60 feet (18 m) and spread into 16 major trunks, apart from the main trunk forming a large canopy of providing shade to the people from the blazing sun of Lahaina; it was intended as a part of a park. The growth of the roots was facilitated by the local Japanese gardening community, by hanging lanterns filled with water at suitable aerial roots. It is one of the sixty fig tree species in Hawaii and is said to be the largest tree both in Hawaii and in the United States. It has a circumference of about one-fourth of a mile, and about a thousand people could congregate under it. A sight to watch at dusk time is the congregation of birds such as common myna birds (Acridotheres tristis) which roost in the branches of the tree for the night causing a cacophony of bird cries.

The tree has been subject to severe stress due to drought conditions, soil compaction from foot and vehicle traffic in the park, and also due to developmental activities in the vicinity. As a result, restrictions have been imposed on plying vehicles under the tree. Its sustenance has been ensured by the Lahaina Restoration Foundation by installing an irrigation system in the park.

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  A plaque giving details of the tree
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  The main trunk of the banyan tree
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  The main trunk of the banyan tree at Lahaina
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  The banyan tree in Lahaina spread over one acre of land
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  Banyan Tree in Lahaina
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  Graffiti on the trunks of the tree

• List of individual trees

• Legarde, Lisa; Foster, Jeanette (1996). Frommer's Maui, with the Best Beaches, Shopping and Dining. John Wiley & Sons, Incorporated. ISBN 978-0-02-860905-8.
• Scott, Susan (1 January 1991). Plants and Animals of Hawaii. Bess Press. p. 53. ISBN 978-0-935848-93-9.