Mayotte
0-14 years: 45.3% (male 50,985/female 50,413)
15-64 years: 52.9% (male 63,395/female 54,882)
65 years and over: 1.8% (male 2,085/female 2,005) (2009 est.)

Mexico
0-14 years: 29.1% (male 16,544,223/female 15,861,141)
15-64 years: 64.6% (male 34,734,571/female 37,129,793)
65 years and over: 6.2% (male 3,130,518/female 3,811,543) (2009 est.)

Micronesia, Federated States of 0-14 years: 34.8% (male 19,010/female 18,411) 15-64 years: 62.3% (male 33,286/female 33,629) 65 years and over: 2.9% (male 1,317/female 1,781) (2009 est.)

Moldova
0-14 years: 15.9% (male 353,495/female 334,592)
15-64 years: 73.3% (male 1,536,263/female 1,629,882)
65 years and over: 10.8% (male 172,070/female 294,446) (2009 est.)

Monaco
0-14 years: 14.6% (male 2,466/female 2,349)
15-64 years: 62.4% (male 10,184/female 10,395)
65 years and over: 23% (male 3,068/female 4,503) (2009 est.)

Mongolia
0-14 years: 28.1% (male 436,391/female 418,923)
15-64 years: 67.9% (male 1,031,819/female 1,033,806)
65 years and over: 4% (male 52,430/female 67,773) (2009 est.)

Montenegro
0-14 years: 16% (male 52,645/female 54,846)
15-64 years: 70.3% (male 244,949/female 227,794)
65 years and over: 13.7% (male 37,217/female 54,729) (2009 est.)

Montserrat
0-14 years: 27.6% (male 731/female 678)
15-64 years: 65.5% (male 1,599/female 1,738)
65 years and over: 6.9% (male 232/female 119) (2009 est.)

Morocco
0-14 years: 30% (male 5,333,396/female 5,131,886)
15-64 years: 64.7% (male 11,261,139/female 11,305,792)
65 years and over: 5.2% (male 781,089/female 1,046,062) (2009 est.)

Mozambique
0-14 years: 44.3% (male 4,829,272/female 4,773,209)
15-64 years: 52.8% (male 5,605,227/female 5,842,679)
65 years and over: 2.9% (male 257,119/female 361,772) (2009 est.)