Hip fractures in individuals 65 years or older are common (>250 000 per year in the US) and consequential (1-year mortality rate, 12%-37%). 1 Prior studies of orthopedic trauma (ie, fractures) in the general population documented a decline at the beginning of the COVID-19 pandemic in March-April 2020, 2 followed by a return to baseline by summer 2020 once shelter-in-place orders were lifted. 3 We assessed hip fracture surgery volumes among older individuals during the pandemic.Methods | This study was approved by the Kaiser Permanente (KP) Institutional Review Board with exemption of informed consent. We used data from the KP Hip Fracture Registry (a surveillance tool with 100% coverage) along with membership data and administrative claims. 4 Patients aged 65 years or older who underwent hip fracture surgery between January 1, 2018, and September 26, 2021, in a California KP hospital (n = 31) were included.Based on COVID-19 hospitalizations and vaccinations recorded in the California COVID-19 dashboard, 8 phases were identified: presurge (1/1/20-3/15/20), spring 2020 surge (3/16-5/10), early summer 2020 (5/11-6/28), summer 2020 surge (6/29-8/23), fall 2020 (8/24-11/22), winter surge (11/23/ 20-2/21/21), early vaccination period (2/22-7/18), and Delta wave (7/19-9/26). For each phase, hip fracture surgery volume (procedures per 1 million person-weeks) was calculated as number of procedures divided by California KP health plan membership. The incidence rate during each phase was compared with the historical period 2 years prior (eg, 1/1/18-3/ 15/18 for presurge phase) using incidence rate ratios (IRRs) with Poisson regression.