Abstract: This paper presents the results of a study on factors influencing Community Health Fund (CHF) enrollment, using a case of Modified CHF in Dodoma. The study was carried out in 11 wards in Dodoma municipality for three months, from December 2013 to February 2014. Specific objectives of the study were to examine trend of enrollment in modified CHF, to identify factors influencing modified CHF enrollment and to evaluate weaknesses and strengths of modified CHF enrollment. Cross section design was used in the study. Snow ball sampling was used to obtain 152 CHF members. Primary data were collected using questionnaire where as secondary data were obtained from CHF documents in Dodoma municipality office and publications from the internet. Data analysis was done using logistic regression to determine factors that influence CHF enrollment. The results revealed that household size, medical expenses and marital status significantly influence decision to enroll. The level of risk and availability of alternative health insurance affect the decision to enroll.