This study evaluates the relationship between gait speed and survival in older adults, using data from 9 cohort studies involving 34,485 participants aged 65 years or older. The overall 5-year survival rate was 84.8%, and the 10-year survival rate was 59.7%. Gait speed was associated with survival in all studies, with a pooled hazard ratio of 0.88 (95% CI, 0.87–0.90) for each 0.1 m/s increase in gait speed. Survival increased across the full range of gait speeds, with significant increments per 0.1 m/s. At age 75, predicted 10-year survival ranged from 19% to 87% in men and from 35% to 91% in women. Predicted survival based on age, sex, and gait speed was as accurate as predicted based on age, sex, use of mobility aids, and self-reported function or as age, sex, chronic conditions, smoking history, blood pressure, body mass index, and hospitalization. The study concludes that gait speed is associated with survival in older adults and can be used to refine survival estimates in clinical practice or research.This study evaluates the relationship between gait speed and survival in older adults, using data from 9 cohort studies involving 34,485 participants aged 65 years or older. The overall 5-year survival rate was 84.8%, and the 10-year survival rate was 59.7%. Gait speed was associated with survival in all studies, with a pooled hazard ratio of 0.88 (95% CI, 0.87–0.90) for each 0.1 m/s increase in gait speed. Survival increased across the full range of gait speeds, with significant increments per 0.1 m/s. At age 75, predicted 10-year survival ranged from 19% to 87% in men and from 35% to 91% in women. Predicted survival based on age, sex, and gait speed was as accurate as predicted based on age, sex, use of mobility aids, and self-reported function or as age, sex, chronic conditions, smoking history, blood pressure, body mass index, and hospitalization. The study concludes that gait speed is associated with survival in older adults and can be used to refine survival estimates in clinical practice or research.