Unknown. Estimates for Roman Britain range up to 5 million, though I'm highly sceptical of anything over 1-2m, probably around 1m this early in the Empire.
The terrain, the amount of rainfall, and the quality of the soil affected the population density in Western Europe around 1000 AD.
The world population in 1000 A.D. was 257,053,896 The world population in 1000 B.C. was 36,459,534
1000
1000 to 1300 AD can be written as: M - MCCC AD.
Factors that affected population density in Western Europe around 1000 AD included agricultural advancements like the three-field system, which increased food production. Additionally, technological improvements in plows and mills helped increase efficiency. Political stability and urbanization also played a role in shaping population density during this time.
1000 AD
The population of Ad-Duwwara is 1,685.
The population of Arsenal AD is 7,000.
The population of Arsenal AD is 2,010.
The population of Politika AD is 400.
The population of Novosti AD is 451.
The population of Kremikovtzi AD is 6,979.