The overall goal of this study was to assess the longitudinal changes in bone strength in women reporting rheumatoid arthritis (RA) (n=78) compared to non-arthritic control participants (n=4,779) of the Women's Health Initiative Bone Mineral Density sub-cohort. Hip structural analysis program was applied to archived dual energy X-ray absorptiometry scans (baseline, years 3, 6, and 9) to estimate bone mineral density (BMD) and hip structural geometry parameters in three femoral regions: narrow neck, intertrochanteric and shaft. The association between RA and hip structural geometry was tested using linear regression and random coefficient models (RCM). Compared to the non-arthritic control the RA group had a lower BMD (p=0.061) and significantly lower outer diameter (p=0.017), cross-sectional area (p=0.004), and section modulus (p=0.035) at the narrow neck region in the longitudinal models. No significant associations were seen at the intertrochanteric or shaft regions, and the association was not modified by age, ethnicity, glucocorticoid use, or time. Within the WHI-BMD, women with RA group had reduced BMD and structural geometry at baseline, and this reduction was seen at a fixed rate throughout the nine years of study.