Apart from the tax-exempt status of religious congregations and several historic nonprofit organizations having religious roots, the relationship between religion and other nonprofits can be rather complicated and understudied. Religious institutions often support other types of nonprofits by providing gathering space, social network, and volunteers but at the same time may compete with non-religious nonprofits by providing similar functions and services. Further, while higher religiosity has been shown to promote larger amount of giving, most of the giving is religiously directed. In this study we use a longitudinal dataset of nonprofits in the US counties from 1995 to 2020 to empirically analyze the dynamic relationship between religious and non-religious nonprofit organizations. After controlling for other socio-economic environmental and organizational factors, results show that higher levels of religiosity in a community tends to lower the founding rate of other nonprofit organizations. Furthermore, religious pluralism increases the mortality rate of human service nonprofit organizations. Thus, rather than supporting nonreligious nonprofit organizations in a community by providing greater social, human capital and financial support, religion seems to be more detrimental for the growth of the nonprofit sector.