According to the CIA World Factbook, Yemen's population stands at 26,052,966 (2014).
Yemen ranks 48 in population size, in comparison to other countries (China ranks first).
The ratio of males to females in Yemen is: 1.03 (this is the ratio of the entire population, in every age groups).
Yemen's population has 13,218,993 males and 12,833,973 females - about 385020 more males than females.
Distribution of the different religions in Yemen (statistics)
Muslim 99.1% (official; virtually all are citizens, an estimated 65% are Sunni and 35% are Shia), other 0.9% (includes Jewish, Baha'i, Hindu, and Christian; many are refugees or temporary foreign residents) (2010).
Distribution of the various ethnic groups in Yemen (statistics)
predominantly Arab; but also Afro-Arab, South Asians, Europeans.
Population Growth Rate
Population growth rate is the average annual percent change in the population, resulting from a surplus (or deficit) of births over deaths and the balance of migrants entering and leaving a country. The rate may be positive or negative. The growth rate is a factor in determining how great a burden would be imposed on a country by the changing needs of its people for infrastructure (e.g., schools, hospitals, housing, roads), resources (e.g., food, water, electricity), and jobs. Rapid population growth can be seen as threatening by neighboring countries.
The population growth rate in Yemen stands at 2.720 percent (2014 data).
Yemen is ranked 20 in the world in terms of population growth rate.
Yemen's population's growth rate is positive. It indicates that its population has grown at a rate of 2.720 percent per year (an increase of 708,641 people per year).
Birth rate is the average annual number of births during a year per 1,000 persons in the population at midyear; also known as crude birth rate. The birth rate is usually the dominant factor in determining the rate of population growth. It depends on both the level of fertility and the age structure of the population.
The birth rate in Yemen stands at an annual average of 31.02 per 1,000 people in the population (2014 data).
In terms of birth rate, this statistical datum places Yemen as no. 39 in the world.
This birth rate indicates that there are 808,163 births per year in Yemen.
Death rate is the average annual number of deaths during a year per 1,000 population at midyear; also known as crude death rate. The death rate, while only a rough indicator of the mortality situation in a country, accurately indicates the current mortality impact on population growth. This indicator is significantly affected by age distribution, and most countries will eventually show a rise in the overall death rate, in spite of continued decline in mortality at all ages, as declining fertility results in an aging population.
The death rate in Yemen stands at an annual average of 6.45 per 1,000 people in the population (2014 data).
In terms of death rate, this statistical datum places Yemen as no. 154 in the world in the world.
This death rate reveals that Yemen has 168,042 cases of death a year.
Net Migration Rate
Net migration rate is the difference between the number of persons entering and leaving a country during the year per 1,000 persons (based on midyear population). An excess of persons entering the country is referred to as net immigration; an excess of persons leaving the country as net emigration. The net migration rate indicates the contribution of migration to the overall level of population change. The net migration rate does not distinguish between economic migrants, refugees, and other types of migrants nor does it distinguish between lawful migrants and undocumented migrants.
The net migration rate of Yemen stands at 2.61 per 1,000.
The migration rate indicates that Yemen's population grows annually by about 67,998 people, as a result of migration.
The net migration rate of Yemen places it as no. 37 in the world.
Additional Population Characteristics
Median age is the age that divides a population into two numerically equal groups; that is, half the people are younger than this age and half are older. It is a single index that summarizes the age distribution of a population.
The median age of Yemen's population (male and female) is 18.6 years of age.
The median age of Yemen's male population in is 18.5.
The median age of Yemen's female population in is 18.7.
Urbanization And Urbanization Rate
About 32.3 percent of Yemen's population lives in urban areas; according to population size data in Yemen, the number of urban residents is around 8,415,108.
The population rate of urban areas in Yemen indicates that the urban population there has been growing by 4.78 percent per year.
Links to Sources and Additional Information
Information about Yemen in the CIA World Factbook's website: See Link
Information about Yemen may be found at Wikipedia's website in English: See Link
All the data concerning this answer are as they were presented at the CIA World Factbook's website in January 2015.