This paper presents, the effect of soil spatial variability on response of laterally loaded well foundation embedded in linear elastic soil medium. The spatial variation of elastic modulus of soil along embedment depth of the foundation is modeled using random field theory. Elastic modulus of soil is considered to be random variable that follows Log-Normal probability distribution. Monte Carlo simulation technique is used to generate various random realization of spatial variability of elastic modulus of soil. Random realization is done for different values of coefficient of variation of elastic modulus with different spatial correlation distance. A finite element model is developed for laterally loaded well foundation embedded in linear soil. The finite element model is then coupled with the random field of elastic modulus of soil to analyze effect of soil spatial variability on the response of well foundation under different values of lateral load. The results obtained from this study indicate that spatial variation of soil elastic properties has small effect on lateral response of well foundation irrespective of magnitude of lateral load. © Springer Nature Singapore Pte Ltd. 2020.