Sentience Institute estimate from 2019: more than 90% of all farmed animals worldwide live in factory farms.
About 74% of land animals (chickens, pigs, cows etc) and virtually all farmed fish.
At any moment roughly 31 billion land animals plus 39 to 216 billion fish.
Fish make up around 78% of the total, meat chickens 12%, egg chickens 5%.
In the US the figure is even higher: 99% of farmed animals.
https://www.sentienceinstitute.org/global-animal-farming-estimates
Guardian reported July 2026 that the number of mammals and poultry farmed worldwide jumped 53% since 2006.
Iowa alone has over 15,000 factory farms producing 107 million tons of manure a year, up 13% in large facilities since 2019.
Faunalytics report late 2025 showed international banks still funding factory farm expansion in poorer countries.
Global meat production hit new highs in 2025 driven by more poultry and pigs.
Projections show farmed animal numbers set to rise further through 2033 especially fish and insects.