United States β’ --:--:--
π Data last updated: May 20, 2026 β’ β±οΈ Counters calculate from this baseline
Important: These are model inputs, not a measured city age profile. Country-level birth, death and life-expectancy values are applied to the city baseline because city-level vital statistics are not available consistently for every location in this dataset.
The imported city population is the baseline observation used by this page. We do not present reconstructed historical city populations as observed facts because applying today's national birth/death rates backward would not account for migration, boundary changes or historical rate changes.
If current national birth and death rates stayed constant and migration were ignored, the model would produce 650,066 by 2030, 655,285 by 2040, and 660,547 by 2050. This is a scenario calculation, not an official forecast. It assumes constant rates and excludes migration, boundary changes, policy and economic shifts.
Mission Viejo is a medium-sized city located in United States. With an estimated population of 647,990 people, it represents a significant urban center within the country. The city operates in the America/Adak time zone (UTC-9:00), placing it among the cities that share this temporal region.
Demographically, Mission Viejo has a growing natural-change estimate. With a birth rate of 11 and a death rate of 10.2 per 1,000 residents annually, the population is steadily growing. The average life expectancy stands at 77.0 years, reflecting the overall health and living conditions in the region. The model estimates approximately 7,128 births and 6,609 deaths per year, resulting in a net change of 519 people per year.
The live counters on this page provide continuously updated estimates based on these annual rates, calculating births, deaths, and population changes from our baseline data date of 2026-05-20. These figures offer valuable insights into the demographic dynamics of Mission Viejo and its position within United States's urban landscape.