The Scout Association of Hong Kong is the largest scouting organisation in Hong Kong. Scout training was first introduced in Hong Kong by Rev Spink of St Andrew's Church, Kowloon in 1909 and 1910 by the Protestant based Boys' Brigade, Chums Scout Patrols and British Boy Scouts. The Catholic St. Joseph's College, formed its Boy Scout Troop in 1913, and registered with the Boy Scouts Association of the United Kingdom in 1914. The Boy Scouts Association formed its Hong Kong Local Association in July 1915 which became its Hong Kong Branch. After changes to the name of the United Kingdom organisation in 1967, the branch name was changed to The Scout Association Hong Kong Branch. In 1977, The Scout Association of Hong Kong was constituted as an autonomous association and successor to The Scout Association's Hong Kong Branch and became the 111th member of the World Organization of the Scout Movement (WOSM) in 1977.

In 2008, the association had 95,877 uniformed members, with approximately 2,700 Scout groups in the sections Grasshopper Scouts, Cubs, Scouts, Venture and Rover Scouts, making it the largest uniformed youth organisation in Hong Kong. The headquarters at the Hong Kong Scout Centre (香港童軍中心) in Tsim Sha Tsui, Kowloon host the administration, headed by the Hong Kong Chief Commissioner (香港總監).

The association runs campsites, including Gilwell Campsite (基維爾營地), Tai Tam Scout Centre (大潭童軍中心) and Tung Tsz Scout Centre (洞梓童軍中心), as well as hostels and Scout Activity Centres. It annually organises the traditional Scout Rally, providing Scout competitions and activities. For specific anniversaries, themed jamborees have been organised.

The Scout movement is the largest uniform group in Hong Kong, consisting of more than 100,000 members.

Scout training was first introduced to boys in Hong Kong in 1909 and 1910, only a few years after the beginning of the Scout movement in the United Kingdom, when Rev. Spink started a Boys' Brigade Company attached to the St. Andrew's Church in Kowloon, in response to popular requests for Scouting activities in the expatriate community of Hong Kong. By 1911, British merchants and military personnel had started to organise Boy Scout troops in the city. On 16 April 1912, Lieutenant-General Baden-Powell, Chief Scout of The Boy Scouts Association, arrived in Hong Kong by HMS Lutzou. He was a guest in the Government House and discussed with officials of the Hong Kong Government the establishment of a branch of The Boy Scouts Association of the United Kingdom and the organisation of a Boy Scout Movement in the city.

Enthusiasts and organisations, including Queen's College and St. Joseph's College, established Boy Scout troops. On 20 September 1913, St. Joseph's College formed a Boy Scout troop. Baden-Powell sent a letter of congratulation to the St. Joseph's College Boy Scouts on 26 November 1913, which was published in the first issue of the Scout Gazette, the first Scout publication in Hong Kong. The St. Joseph's College troop was the first affiliated with the Boy Scout Association being registered as the 1st Hong Kong Boy Scout Troop on 1 May 1914. At the time, the Chief Scout was Major F.J. Bowen and the Scoutmaster was Albert Edwards. Besides training in map reading and communication, the troop also provided training in ambulance by Dr Coleman. On 29 December 1914, the troop was extended with a short-life Sea Scout Troop by Capt. P. Streafield, connected to HMS Triumph of the Royal Navy. The Troop also held the first Scout camp in Murray Barracks. At the same time, Bowen was invited to Peak School to educate pupils in Scouting and the school later established a Wolf Cub Pack. The 2nd Hong Kong Scout Troop of St. Andrew's Church was registered on 25 November 1914. Major Alexander Anderson McHardy was appointed Colony Commissioner on 1 May 1914 and then-Governor of Hong Kong Francis Henry May became Chief Scout of Hong Kong. At the beginning all member Scouts were of European descent and not well-recognised by Chinese society. Membership was restricted to those of British nationality. Vice Admiral Robert Hamilton Anstruther succeeded Major McHardy as Colony Commissioner on 1 May 1915. The Boy Scout Association Hong Kong branch started up in July 1915, and was responsible for Scout training. At the end of September 1915, there were in total 155 members in the first census.

Seamen's Institute (Chinese: 海員訓練學校) was an institute training seamen in Hong Kong located at 8, Praya East which is now the Harcourt Building at Gloucester Road, Wan Chai. In the early days of The Scout Association of Hong Kong, they conducted non-regular activities in the institute.

During World War I, many Scouting leaders served in the war, which limited Scouting in Hong Kong, but the 1st World Scout Jamboree between 30 July and 8 August 1920 revived Hong Kong Scouting. Lieutenant-Colonel F. J. Bowen returned to Hong Kong after the end of the war, and actively participated in the Movement. He became the Colony Commissioner in July 1920 and reorganised the Hong Kong Branch. At the end of 1920, membership was approximately 140 members.