Which country has the highest male-female ratio?

The male-female ratio is the proportion of males to females in a given population at a specified stage in life e.g. at conception, at birth and at any chosen stage between birth and death. This is usually expressed as the number of males per 100 females. Qatar has the highest ratio with 187 males to 100 females. However, the ratio for the entire world population is 101 males to 100 females. Qatar’s high male-female ratio is mainly on account of large immigrant labourers staying without families. In Qatar, the ratio goes up to 284 males to 100 females for the population above 65 years on account of aging male immigrants and comparatively higher average mortality rate for females.