The French protectorate of Laos was a French protectorate of what is today Laos between 1893 and 1953 — with a brief interregnum as a Japanese puppet state in 1945 — which constituted part of French Indochina. It was established over the Siamese vassal, the Kingdom of Luang Phrabang, following the Franco-Siamese War in 1893. It was integrated into French Indochina and in the following years further Siamese vassals, the Principality of Phuan and Kingdom of Champasak, were annexed into it in 1899 and 1904, respectively. The protectorate of Luang Prabang was nominally under the rule of its King, but actual power lay with a local French Governor-General, who in turn reported to the Governor-General of French Indochina. The later annexed regions of Laos were, however, purely under French rule.

The French Protectorate of Laos established two (and at times three) administrative regions governed from Vietnam in 1893. It was not until 1899 that Laos became centrally administered by a single Resident Superieur based in Savannakhet, and later in Vientiane. The French chose to establish Vientiane as the colonial capital for two reasons, firstly it was more centrally located between the central provinces and Luang Prabang, and secondly the French were aware of the symbolic importance of rebuilding the former capital of the Lan Xang Kingdom which the Siamese had destroyed.

As part of French Indochina both Laos and Cambodia were seen as a source of raw materials and labor for the more important holdings in Vietnam. French colonial presence in Laos was light; the Resident Superieur was responsible for all colonial administration from taxation to justice and public works. The French maintained a military presence in the colonial capital under the Garde Indigene made up of Vietnamese soldiers under a French commander. In important provincial cities like Luang Prabang, Savannakhet, and Pakse there would be an assistant resident, police, paymaster, postmaster, schoolteacher and a doctor. Vietnamese filled most upper level and mid-level positions within the bureaucracy, with Lao being employed as junior clerks, translators, kitchen staff and general laborers. Villages remained under the traditional authority of the local headmen or chao muang. Throughout the colonial administration in Laos the French presence never amounted to more than a few thousand Europeans. The French concentrated on the development of infrastructure, the abolition of slavery and indentured servitude (although corvee labor was still in effect), trade including opium production, and most importantly the collection of taxes.

Under the French rule, the Vietnamese were encouraged to migrate to Laos, which was seen by the French colonists as a rational solution to a practical problem within the confines of an Indochina-wide colonial space.^[48] By 1943, the Vietnamese population stood at nearly 40,000, forming the majority in the largest cities of Laos and enjoying the right to elect their own leaders.^[49] As a result, 53% of the population of Vientiane, 85% of Thakhek and 62% of Pakse were Vietnamese, with only an exception of Luang Phrabang where the population was predominantly Lao.^[49] As late as 1945, the French even drew up an ambitious plan to move massive Vietnamese population to three key areas, i.e. the Vientiane Plain, Savannakhet region, Bolaven Plateau, which was only discarded by Japanese invasion of Indochina.^[49] Otherwise, according to Martin Stuart-Fox, the Lao might well have lost control over their own country.^[49]

The Lao response to French colonialism was mixed, although the French were viewed as preferable to the Siamese by the nobility, the majority of Lao Loum, Lao Theung, and Lao Sung were burdened by regressive taxes and demands for corvee labor to establish colonial outposts. In 1914, the Tai Lu king had fled to the Chinese portions of the Sipsong Panna, where he began a two-year guerilla campaign against the French in northern Laos, which required three military expeditions to suppress and resulted in direct French control of Muang Sing.

By 1920 the majority of French Laos was at peace and colonial order had been established. In 1928, the first school for the training of Lao civil servants was established, and allowed for the upward mobility of Lao to fill positions occupied by the Vietnamese. Throughout the 1920s and 1930s France attempted to implement Western, particularly French, education, modern healthcare and medicine, and public works with mixed success. The budget for colonial Laos was secondary to Hanoi, and the worldwide Great Depression further restricted funds. It was also in the 1920s and 1930s that the first strings of Lao nationalist identity emerged due to the work of Prince Phetsarath Rattanavongsa and the French Ecole Francaise d’Extreme Orient to restore ancient monuments, temples, and conduct general research into Lao history, literature, art and architecture.