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Millenials have overtaken Babyboomers by nearly 4 million to become the largest generation in the United States. With a current population of around 79 million, the Millenial generation is expected to grow to 81 million over the next 20 years because of migration, according to the US Census Bureau's latest estimates.

The boundaries that define generations are not universally agreed, and yet these boundaries carry important implications in business and government. The size, financial security, and general health of each generation shapes everything from marketing campaigns to insurance and social welfare benefits to transportation and health services planning. 

  • According to the Pew Research Center, the oldest Millenial was born in 1981 while the youngest was born in 1997.
  • Synchrony Financial uses much lower boundaries, defining the Millenial generation as those born from 1976 through 1992.
  • Considering still other definitions, the birth year of the oldest Millenial varies from 1976 to 1986 while the birth year of the youngest ranges from 1993 to 2010.
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Related Data Insights

Population By Age Groups

Median Age of Population in the World

Between 1970 and 2015, the median age of the World's total population grew substantially from 21.54 to 29.6 years rising at an increasing annual rate that reached 3.90 % in 2015. By 2100, the median age is expected to further grow to 41.6 years.

Median Age of Population: Ranking by Countries

Japan is the top country by median age of the total population in the world. As of 2015, the median age of Japan's population was 46.35 years. The top 5 countries also include Italy, Germany, Portugal, and Bulgaria. The median age of the population in Japan increased from 28.78 years in 1970 to 46.35 years in 2015 growing at an average annual rate of 5.45 %. The median age of the population is an age that divides the population in two parts of equal size, that is, there are as many persons with ages above the median as there are with ages below the median. It is expressed as years.

India Population by Age, 2013

Select the Age to View Chart All ages   0   1   2   3   4   5   6   7   8   9   10   11   12   13   14  15   16   17   18   19    20    21    22    23    24    25    26    27    28    29    30    31    32    33    34    35    36    37    38   39    40    41    42    43    44    45    46    47    48    49   50    51    52    53    54    55    56    57    58    59    60    61    62    63    64    65    66   67    68    69    70    71    72    73    74    75    76    77    78    79    80    81    82    83    84    85    86    87    88    89    90    91    92    93    94    95    96    97    98   99   100+   Age not stated