The museum consists of a building which houses the majority of collections held.
This building was originally built in 1861 as the site of the Kinghorn School SS #23.
It was updated and expanded in 1958 and again in 1963, and purchased by the township in 1978.
The township gave operational control of the building to the King Township Historical Society, which established the museum in 1979 and opened it in 1982.
The museum was operated on a volunteer basis until 2001, when the township municipal government assumed control of the museum.
The government established a management board, to which individuals are appointed by the township council.

In 2012, a 749 square feet (69.6 m²) addition was built by the real estate development company Genview Homes, which leased it and used it as its sales office for a development adjacent to the museum grounds in exchange for repairing or upgrading damaged parts of the building.
The flat, leaky roof was rebuilt as a peaked roof.
Once vacated by Genview, the space may be used for various services, such as a lecture hall with a capacity of 60 to 80 guests.

On the grounds of the 2.5 acre property owned by the museum are several heritage sites.
The King Township Historical Society raised funds to acquire and move King Station from Black Creek Pioneer Village to the grounds in 1989, where it now fronts King Road.
It was the original railway station building of Springhill (now King City), and believed to be the oldest surviving railway station in Canada, built by the Ontario, Simcoe and Huron Railway in 1852 and first served passengers in 1853.
The single-storey board and batten structure was in poor shape by then, and restoration began soon after to repair the damage.
It was painted green and grey after the initial restoration, and is now painted cream yellow with green trim.
It is the only surviving station building of the original Ontario, Simcoe and Huron Railway buildings.

The other heritage building is the King Christian Church built in 1851 by the Children of Peace, a religious group active in Sharon from the 1810s to the 1890s.
It was renamed to the King Emmanuel Baptist Church in 1931 and permanently closed in 1978.
It was moved from its original location at Kettleby Road and Jane Street to the museum grounds in 1982.

In August 2017, Laskay Hall was moved to the site from its original location in Laskay.
It will be used for cultural programs such as art, music, dance, and theatre; an event venue for Laskay residents; a performing arts space; and as an additional exhibit for the museum.
A basement will eventually be built for it, which will be used for storage by the museum and Arts Society King.

The site also contains a dredge built in the 1970s that was used to clear the canals of the Holland Marsh until the 1990s, and was obtained by the museum in 2001.
The museum consists of a building which houses the majority of collections held. This building was originally built in 1861 as the site of the Kinghorn School SS #23. It was updated and expanded in 1958 and again in 1963, and purchased by the township in 1978. The township gave operational control of the building to the King Township Historical Society, which established the museum in 1979 and opened it in 1982. The museum was operated on a volunteer basis until 2001, when the township municipal government assumed control of the museum. The government established a management board, to which individuals are appointed by the township council.
In 2012, a 749 square feet (69.6 m²) addition was built by the real estate development company Genview Homes, which leased it and used it as its sales office for a development adjacent to the museum grounds in exchange for repairing or upgrading damaged parts of the building. The flat, leaky roof was rebuilt as a peaked roof. Once vacated by Genview, the space may be used for various services, such as a lecture hall with a capacity of 60 to 80 guests.
On the grounds of the 2.5 acre property owned by the museum are several heritage sites. The King Township Historical Society raised funds to acquire and move King Station from Black Creek Pioneer Village to the grounds in 1989, where it now fronts King Road. It was the original railway station building of Springhill (now King City), and believed to be the oldest surviving railway station in Canada, built by the Ontario, Simcoe and Huron Railway in 1852 and first served passengers in 1853. The single-storey board and batten structure was in poor shape by then, and restoration began soon after to repair the damage. It was painted green and grey after the initial restoration, and is now painted cream yellow with green trim. It is the only surviving station building of the original Ontario, Simcoe and Huron Railway buildings.
The other heritage building is the King Christian Church built in 1851 by the Children of Peace, a religious group active in Sharon from the 1810s to the 1890s. It was renamed to the King Emmanuel Baptist Church in 1931 and permanently closed in 1978. It was moved from its original location at Kettleby Road and Jane Street to the museum grounds in 1982.
In August 2017, Laskay Hall was moved to the site from its original location in Laskay. It will be used for cultural programs such as art, music, dance, and theatre; an event venue for Laskay residents; a performing arts space; and as an additional exhibit for the museum. A basement will eventually be built for it, which will be used for storage by the museum and Arts Society King.
The site also contains a dredge built in the 1970s that was used to clear the canals of the Holland Marsh until the 1990s, and was obtained by the museum in 2001.
King Township Museum