With the AIDS endemic still not under control in Sub-Saharan Africa, there is a need to study the factors that influence people to be tested for HIV. In 2007 there were approximately 1.9 million new infections in the sub-Saharan region. "Two thirds (67%) of the global total of 32.9 million people with HIV live in this region, and three quarters (75%) of all AIDS deaths in 2007 occurred there" (Joint United Nations Programme on HIV/AIDS). This study focuses both on the variables that are significant for women in Tanzania to have a high level of HIV knowledge, and in turn, how that knowledge affects her decision to be tested for HIV. It is found that education and socioeconomic status are significant in both determining a woman's level of HIV knowledge, as well predicting if she has been tested for HIV, and that HIV knowledge itself is a statistically significant indicator of whether or not a person will be tested for HIV. These results will be relevant for future health policy programs, especially as they pertain to the most at risk groups in need of HIV education and health facilities. This information is also important for international non-profit and governmental organizations like USAID and PEPFAR when they are determining how to target their budgets in health and education programs.