Six thousand. That is the number now missing each year for births to offset deaths in France. A figure almost negligible when viewed against a country of 69 million inhabitants, yet laden with meaning: it marks the return of a phenomenon France had not known since the end of World War II. As demographic tallies are published, INSEE has confirmed a silent shift, barely noticeable in daily life, but whose consequences look set to be profound for the decades to come.
- In 2025, France’s natural balance turned negative (-6,000), a first since 1945, with 645,000 births against 651,000 deaths.
- This shift is explained by a drop in births (fertility at 1.56 children per woman, the lowest since 1918) combined with an increase in mortality linked to a deadly winter flu outbreak.
- French population growth (69.1 million inhabitants as of 1 January 2026) now rests solely on net migration, while those aged 65 and over account for 22% of the population, close to those under 20.
- A symbolic milestone passed in silence
- When births no longer suffice to offset deaths
- 1945, the last time France had experienced this shift
- What this figure signals for the decades to come
A symbolic milestone crossed in silence
No sirens, no grand announcements: it is in the quiet of official statistics that France tipped over. In 2025, the natural balance, i.e. the difference between the number of births and the number of deaths, turned negative for the very first time since 1945. Concretely, it stood at -6 000. A figure that may seem tiny next to the country’s total population, but it signals a historic reversal: for the first time since the Liberation, France is dying naturally more than it is being born.
This shift did not emerge from nowhere. A parliamentary report from the National Assembly’s Social Affairs Committee had already sounded the alarm, noting for 2024 a natural balance of +17 000, described at the time as the weakest since the end of World War I. In other words, the country was already flirting with the red line. There was only one step left to take, and the 2025 figures confirm that this step has indeed been taken.
When births no longer suffice to offset deaths
To understand this shift, one must look at the two sides of the demographic scale. On one hand, births continue to decline: 645,000 babies were born in France in 2025, a 2.1% drop from 2024, and especially a 24% decrease from 2010, the year of the last peak in births. The short-term fertility indicator, which measures the average number of children per woman, falls to 1.56 children per woman, its lowest level since the end of World War I.
On the other hand, mortality followed the opposite path: 651,000 deaths were recorded in 2025, up 1.5% from the previous year. This rise is notably explained by a deadly winter influenza epidemic. Sylvie Le Minez, head of the demographic and social studies unit at INSEE, summarizes the rapidity of this phenomenon: “what strikes is how, in only a few years, the natural balance has diminished due to the rapid decline in births.” Two curves crossing, and the country’s entire demographic balance wobbles.
1945, the last time France had experienced this shift
We must go back to the end of World War II to find a negative natural balance in France. At that time, the wartime exit context deeply marked the country’s demography, before a demographic renewal in the following years with the baby boom. Today, however, there is no war, no major epidemic to explain this reversal. It is a structural, slow phenomenon, almost insidious, that has settled over the years without making a sound.
This comparison with the Liberation gives the event its symbolic dimension. Where 1945 marked the end of a catastrophe and the dawn of demographic renewal, 2025 is part of a reverse movement: the gradual aging of the population, births faltering year after year while life expectancy continues to rise. A paradox that deserves emphasis: the French live longer than ever, with life expectancy reaching 85.9 years for women and 80.3 years for men in 2025, but there are fewer births.
What this figure signals for the decades to come
As of January 1, 2026, the French population is estimated at 69.1 million inhabitants, a 0.25% increase over the year. But this growth, however modest, no longer rests on natural renewal: it is now entirely carried by the net migratory balance. A direct confirmation of what the parliamentary report mentioned earlier, which anticipated that France’s demographic growth would soon be sustained only by immigration.
Another strong signal of this generational shift: those aged 65 or older now account for 22% of the population, a share almost equal to that of those under 20. The age pyramid, long stable in France, is starting to distort. A slow movement, but one that directly raises questions about funding pensions, the organization of the health system, and, more broadly, the balance between active and dependent generations.
Behind these figures lies a simple yet heavy question: will France be able to reverse this trend, or must it now coexist with a negative natural balance for good? One thing is certain: this milestone reached in 2025 will not be a mere statistical accident tucked away in INSEE’s archives, but the starting point of a new demographic era for the country.
