The hyperbolic stress-strain model has been shown to be valid for modeling the nonlinear stress-strain hehavior of soils prior to failure in soil-structure interaction. However, guidelines for selecting hyperbolic stress-strain pa­rameters for silts have not been puhlished to dale. To fill this need, a series of isotropically consolidated-drained and consolidated-undrained triaxial tests were performed on freshly deposited, normally consolidated silts and clayey silts to provide guidance for selecting hyperholic parameters for these materials.