The phrase "almost every population" is correct and usable in written English.
It can be used when discussing a majority of groups or communities within a certain context, indicating that the statement applies to nearly all of them.
Example: "Almost every population in the study showed a significant increase in health outcomes after the intervention."
Alternatives: "nearly all populations" or "most populations".
We can't get the oil out fast enough, and as a result, almost every caribou population in the boreal forests of northeastern British Columbia and Alberta is rapidly losing ground.
The frequency of type 1 diabetes is rising in almost every national population (4– 6).
What is exceptional in the case of A. andreanskyi are the high levels of mitochondrial divergence between almost every sampled populations, ranging from 5.5 up to 16.5% (ND4 + tRNA-His) between populations separated by low geographic distances (for example just 60 Km between Oukaimeden and J. Sirwa and 45 Km between Oukaimeden and Tizin Tichka).
In every continent and almost every country, our population is growing older.
By then almost every city with a population of half a million or more will be connected to it.
Almost every group in the population experienced less violent crime last year, the report said, including men, women, whites, blacks and 12- to 24-year-olds.
Todd was referring to Louisville's success in distributing black and white students, which it does more evenly than any district in the country with a comparable black student population; almost every school is between 15 and 50 percent African-American.
Thanks to a bizarre twisted socialist-era government law coupled with a backward-looking Catholic church and a weak-willed public and private sector, a mindset of "work less but gain more" was created and influenced almost every worker in a population of more than 61 million.
In the Diaspora, in almost every country the Jewish population in general is either declining or steady, but Orthodox and Haredi Jewish communities, whose members often shun birth control for religious reasons, have experienced rapid population growth.
The migrant population fares worse than the urban population on almost every indicator of maternal health [ 5].
