Background: Low Birth Weight (LBW) on born baby become one of the causes of the infant death in Indonesia. Low Birth Weight have risk to had a complications, disabilities and even disorders during it’s growth. Low Birth Weight (LBW) in Tegal City has becoming the 10th ranked in Central Java. Objective: The purpose of this research is to known whitch factors that might have correlation to Low Birth Weight incidence. Methode: This research uses an observational analytic research with cross sectional design. The sampel of this research are 122 babies consist of all low birth weight babies and normal babies in RSI Harapan Anda Tegal City in Januari 2018 untul Desember 2018. The sampling technique that used was purposive total sampling. This research used secondary data from the medical records to gets the data that we needed and the correlation analysis with Chi Square test is formed. Result: There was a significant relationship (p<0,05) eith the incidence of Low Birth Weight, there are Antenatal Care (ANC) with p = 0,000, gestasional age with p = 0,001, mother education with p = 0,024 and maternal parity with p = 0,003. Obtained closeness values from the risk factors that had a relationship, there are Antenatal Care (ANC) with r = 0,363, gestasional age with r = 0,290, mother educationwith r = 0,240 and maternal parity with r = ,233. There are also those risk factor that not had a significant correlation (p>0,05) with the incidence of Low Birthh Weight (LBW), there are the age of the mother with p = 0,629 and family social-economics with p = 0,952. Based on the research results, it was founde that Antenatal Care (ANC) was the most related factor to the incidence of the Low Birth Weight with a weak closeness value (r = 0,363). Conclutions: Antenatal Care (ANC), gestasional age, mother education and maternal parity have a significant relationship to the incidence of the Low Birth Weight (LBW) and Antenatal Care (ANC) was the closest relationship, while the mother age and the family social-economics have no significant relationship ti the incidence of Low Birth Weight (LBW).