Romaniuk notes that "the first demographic surveys (these are not censuses) date from 1924" for the Congo under colonial rule, explicitly distinguishing them from a true census. He discusses estimates around 10 million inhabitants in the 1920s, but treats them as *estimations* derived from early surveys and administrative data rather than a full, systematic census enumeration.

The article states: "In the absence of a census providing even an initial idea of the size of population of the region at the inception of the Congo Free State (the first was taken in 1924), it is impossible to quantify population changes in the period." It further adds: "Since the first official census by the Belgian authorities in 1924 put the population at about 10 million, these various approaches suggest a rough estimate of a total of 10 million dead." This directly indicates that the first census of the Congo Free State/Belgian Congo is described as having been conducted in 1924, and that census reckoned the population at about 10 million.

Discussing claims of demographic losses in the Congo Free State, the author writes: "Hochschild (1998) starts from a double hypothesis: on the one hand, the estimation (this is not a census) of the Congolese population in 1924 is 10 million inhabitants; on the other hand, ‘specialists’ estimate that between 1885 and the aftermath of the First World War the population decreased by half." The text stresses that the 1924 figure of 10 million is an *estimate*, not a census, and that "the first demographic surveys (it is not a census) date from 1924."

A modern overview of African census history states: "The Democratic Republic of the Congo is the only African country to have carried out only one census, in 1984" (at the time the country was called Zaire). The chapter emphasises that earlier population figures under colonial rule came from surveys, registers and estimates, not from national censuses comparable to the 1984 operation.

The entry notes: "As the first census did not take place until 1924, it is difficult to quantify the population loss of the period and these figures have been disputed by some..." This confirms that, in the context of the Belgian colonial empire in Congo, historians refer to a first census occurring in 1924, used as a baseline to discuss population loss under colonial rule.

The handbook (British colonial era reference) includes a passage stating, in context of demographic information on the Belgian Congo, that early population figures were estimates until "the first official census, taken in 1924," which gave a figure of roughly 10 million inhabitants. This indicates a 1924 official Belgian census and a population total around 10 million, used by later scholars as a baseline.

The article summarizing Adam Hochschild’s work states: "Only in the 1920s were the first attempts made at a territory-wide census. In 1924 the population was reckoned at ten million, a figure confirmed by later counts." It frames this as the first territory-wide census effort in the Congo, giving a population estimate of 10 million, although the author critiques Hochschild’s demographic assumptions.

In its background section on the Congo Free State, the article notes: "This world’s largest plantation was 76 times the size of Belgium... and had lost perhaps half of its population by the time the first census counted only 10 million people living there in 1924." It further says, "At the time of the 1924 census, that figure had fallen to 10 million." This describes a census conducted in 1924 which counted about 10 million inhabitants in the Congo territory.

The study guide notes: "The first comprehensive census of the Congo, performed in 1924, put the national population at about 10 million." It uses this figure in discussing estimates of deaths under King Leopold’s regime, taking the 1924 census as the first comprehensive demographic enumeration of the Congo and giving a population total around 10 million.

In a draft article, the author notes: "In the absence of a census providing even a first idea of the population of the region at the beginning of the Congo Free State (the first was taken in 1924), it is impossible to quantify demographic changes during the period." The text continues: "Since the first official census carried out by the Belgian authorities in 1924 put the population at about 10 million, these various approaches suggest an approximate estimate of a total of 10 million deaths." The passage relies on secondary interpretations and explicitly adds: "However, no verifiable record exists."

A summary of the debate on population loss in the Congo Free State states: "Since no census records the population of the region at the inception of the Congo Free State (the first was taken in 1924), the precise population change in the period is not known." It adds: "Since the first official census by the Belgian authorities in 1924 put the population at about 10 million, these various approaches suggest a rough estimate of a population decline by 10 million." The article notes that the magnitude of decline is highly disputed and that sources disagree on both initial and later population sizes.

The timeline entry lists: "1924. First official census records 10 million Congolese alive, meaning an estimated 10 million dead from Leopold's rule." Although a secondary educational site, it clearly repeats the claim that an official census in 1924 recorded 10 million Congolese, and presents this as the first official census for the territory.

The answer by a historian notes that Belgian estimates around 1930 indicate about 10 million inhabitants, and adds: "the country's first real census wasn't until 1984." The historian also says, "The first official census wasn’t undertaken until 1924 and that arrived at a figure of 10 million." This distinguishes between an earlier "official" census in 1924 giving 10 million and a later "real" modern census in 1984, suggesting that 1924 was an initial territory-wide enumeration used by Belgian authorities, but not the same as later systematic censuses of the Democratic Republic of Congo.

Another AskHistorians discussion states: "The first official census wasn’t undertaken until 1924 and that arrived at a figure of 10 million. When combined with Vansina’s claim that the population declined by half between 1880-1920, this gives us figure of 10 million deaths." The contributor uses 1924 as the date of the first official census of the Congo, with a population figure of 10 million, to construct mortality estimates, while also noting lack of reliable statistics before colonial rule.

This demographic overview states: "The first and so far only census conducted in DR Congo dates from 1984." It does not mention the 1924 colonial census, but clarifies that, for the modern Democratic Republic of the Congo as a state, the only full national census took place in 1984. This suggests that earlier colonial-era enumerations, such as 1924, are not counted as modern state censuses in this article.

The article on the demography of the Democratic Republic of the Congo notes: "The Democratic Republic of the Congo has known only one census of its population since its formation as a state, namely that of 1984, at the time when it was called Zaire." It further comments that figures such as "10 million inhabitants" for 1908 or the 1920s are marked as needing references and are based on estimates rather than documented nationwide censuses.

The FamilySearch wiki notes that "The first modern census for the Democratic Republic of the Congo was taken in 1984" and explains that earlier population figures in the colonial period were based on estimates and partial counts, not comprehensive household censuses like those undertaken in some other countries. This indicates that the 1924 Belgian colonial census was not a modern census in the technical sense used for contemporary demographic records, even though it produced a territory-wide population figure.

The chapter "La population du Congo" discusses French colonial Congo but illustrates how early 20th‑century population numbers came from administrative enumerations rather than modern censuses. It notes that official statistics for Moyen‑Congo in 1906 attributed "quite arbitrarily" a population of 3 million inhabitants, while 3.6 million were "recensed" in the whole French Congo, underscoring the rudimentary and partial nature of colonial counts.

In 1921, including Ruanda and Urundi the estimate was 10,000,000. The article notes that a survey of population had been undertaken in the Belgian Congo, but it was not complete and indicated that the population was little more than 7,000,000. These figures show that before the 1924 territory-wide census, population figures for the Congo were based on incomplete counts and estimates rather than a full, reliable census.

To my knowledge the first census in Congo was done in 1924 when 10 million people were counted. There is no census data available for the Congo region before 1924. Earlier figures about the population are therefore based on estimates or secondary accounts rather than on census records.

From general historical knowledge: historians of the Congo Free State and Belgian Congo commonly refer to a territory-wide population enumeration carried out by the Belgian colonial administration in the mid‑1920s, usually cited as 1924, which produced an estimated total population of about 10 million for the Congo. This figure is not based on a modern, systematic household census but on administrative counts and estimates; nevertheless, it is widely used in scholarship as the first quantitative benchmark for Congo’s population under Belgian rule.

A local historical summary notes that in the Congo (Brazzaville) "administrative enumerations" of the population were carried out from the 1920s, but systematic national censuses only began decades later. For the period "from the 1920s to the late 1950s, the Congolese population passed from 440,000 to 910,000 inhabitants," showing reliance on administrative counts rather than a single, comprehensive census in 1924.

Demobase provides reconstructed historical population series for the Democratic Republic of the Congo and Zambia based on various sources. For the early 20th century, its figures rely on demographic back‑projections and estimates rather than on an official national census prior to 1984. This illustrates that the commonly cited 1924 figure is treated as an approximate benchmark rather than a fully documented census dataset.

The article explains that the last national census in the Democratic Republic of the Congo was held in 1984, leaving authorities without reliable population data for decades. It notes that current efforts, supported by UNFPA, aim to organize the first census in 40 years, underscoring that there has only been one modern nationwide census in the DRC (1984) and earlier counts were partial or estimative. This contemporary reporting confirms that pre‑1984 population figures, including the 1924 number, are not from a modern national census.