skip to main content
How Does the Gallup-Sharecare Well-Being Index Work?

How Does the Gallup-Sharecare Well-Being Index Work?

Measuring Purpose, Social, Financial, Community, and Physical Well-Being

Learn about the 2018 updates to the Gallup-Sharecare Well-Being Index methodology.

What is the Gallup-Sharecare Well-Being Index?

In 2008, Gallup and Sharecare initiated a 25-year partnership, merging decades of clinical research, health leadership, and behavioral economics research to track and understand the key factors that drive well-being. The Gallup-Sharecare Well-Being Index provides an in-depth view of Americans' well-being and offers insights into their attitudes and behaviors at the national, state and community levels.

The Well-Being Index measures Americans' perceptions of their lives and their daily experiences through five interrelated elements that make up well-being: sense of purpose, social relationships, financial security, relationship to community, and physical health.

How were interviews conducted for the Gallup-Sharecare Well-Being Index?

Before January 2018, Gallup interviewed U.S. adults aged 18 and older living in all 50 states and the District of Columbia using a dual-frame design, which included both landline and cellphone numbers. Gallup sampled landline and cellphone numbers using random-digit-dial methods. Gallup purchased samples for this study from Survey Sampling International (SSI). Gallup chose landline respondents at random within each household based on which member had the most recent birthday. Each sample of national adults included a minimum quota of 70% cellphone respondents and 30% landline respondents, with additional minimum quotas by time zone within region. Gallup conducted interviews in Spanish for respondents who are primarily Spanish-speaking. View the updated methodology.

How many people were interviewed as part of the Gallup-Sharecare Well-Being Index?

Before 2018, Gallup interviewed approximately 3,500 U.S. adults aged 18 and older each week. More than 175,000 respondents were interviewed each year, and over 2.6 million interviews have been conducted to date since 2008.

How often were Gallup-Sharecare Well-Being Index interviews conducted?

Since it began in 2008, the Gallup-Sharecare Well-Being Index survey has been conducted every day, excluding major holidays and other events, for 350 days per year.

Were Gallup-Sharecare Well-Being Index samples weighted?

Yes, Gallup weighted samples to correct for unequal selection probability, nonresponse, and double coverage of landline and cellphone users in the two sampling frames. Gallup also weighted its final samples to match the U.S. population according to gender, age, race, Hispanic ethnicity, education, region, population density, and phone status (cellphone only, landline only, both, and cellphone mostly). Demographic weighting targets for the U.S. and states were based on the most recent Current Population Survey figures for the aged 18 and older U.S. population, while weighting targets for metropolitan areas and congressional districts were based on Nielsen Claritas statistics. Phone status targets were based on the most recent National Health Interview Survey. Population density targets were based on the most recent U.S. Census. All reported margins of sampling error included computed design effects for weighting.

Where can I find results from the Gallup-Sharecare Well-Being Index and learn more about the survey?

Gallup reports findings from the Gallup-Sharecare Well-Being Index on Sign up for Gallup News alerts to get these articles as soon as they are published.

To get the full trends for U.S. well-being data collected through the Gallup-Sharecare Well-Being Index since 2008, subscribe to Gallup Analytics. For questions about how this survey is conducted, please contact

Learn more about the Gallup-Sharecare Well-Being Index.

Gallup World Headquarters, 901 F Street, Washington, D.C., 20001, U.S.A
+1 202.715.3030