Average life expectancy at birth refers to the average number of years a group of infants would live if the group were to experience the age-specific mortality rates present in that year of birth. Average life expectancy at any age (e.g. 65 years) is the average number of additional years a group of people of a certain age can expect to live assuming age-specific mortality rates remain constant. Compared to average life expectancy at birth, examining age-specific life expectancy is often more useful for shorter term planning because this measure is based on how much longer, on average, a population is projected to live.
Average life expectancy at birth
While the U.S. life expectancy at birth decreased for the third year in a row, life expectancy in Sonoma County has remained constant. In 2015-2017, the average life expectancy at birth in Sonoma County was 81.6 years, comparable with California life expectancy at birth (81.5 years) and higher than the national average (78.6 years) (Figure 2). Women in Sonoma County had a significantly higher life expectancy at birth (83.9 years) compared to men (79.6 years).
Average life expectancy at age 65
In 2015-2017, Sonoma County residents age 65 could expect to live, on average, another 21 years, with women expected to live slightly longer (22.1 years) than men (19.8 years) (Figure 2).
Figure 2. Average life expectancy by age and sex, Sonoma County 2015-2017
View Figure 2 data in table format