Latar belakang: Diabetes melitus disebut sebagai silent killer dan menimbulkan berbagai komplikasi bagi penderitanya. Komplikasi yang disebabkan oleh diabetes melitus tersebut dapat mengenai hampir seluruh organ tubuh serta dapat terjadi secara akut maupun kronis. Komplikasi lebih lanjut dapat dicegah apabila individu memiliki health locus of control yang tinggi dan perilaku self care yang baik. Tujuan: Untuk mengetahui hubungan health locus of control dengan self care pada pasien diabetes melitus di Wilayah Kerja Puskesmas I Denpasar Timur. Metode: Penelitian ini menggunakan deskriptif analitik dan pendekatan cross-sectional. Populasi dari penelitian ini adalah seluruh penderita diabetes melitus di Wilayah Kerja Puskesmas I Denpasar Timur yang diakumulasikan dari bulan April – Mei 2024 yaitu sebanyak 224 penderita dengan jumlah sampel sebanyak 142 responden dengan metode convenience sampling. Instrument penelitian yang digunakan yaitu kuesioner Multidimentional Health Locus Of Control (MHLC) dan kuesioner Summery of Diabetes Self Care Activities (SDSCA). Data dianalisis menggunakan Spearman-rho. Hasil: Hasil penelitian ini ditemukan sebagian besar responden adalah perempuan (52,8%), dengan rentang usia 60-75 tahun (49,3%). Berdasarkan health locus of control ditemukan health locus of control tinggi 73,9%. Dengan perilaku self care 69,7%. Sehingga dari uji analisis dengan Spearman rho ditemukan adanya hubungan yang (p-value

Background: Diabetes mellitus is commonly referred to as the silent killer and leads to numerous complication for those suffering. Diabetes mellitus can lead to complications that impact nearly all the organs in the body, occurring either acutely or chronically. Further complication may be prevented if people possess a strong health locus of control and have effective self-care practices. Purpose: To determine the the correlation between health locus of control and self-care in patient with diabetes mellitus in the working area of public health center I East Denpasar. Method: This study employed descriptive analytic study with cross-sectional approach. The population of the study were 224 patients with diabetes mellitus in the working area of Public Health Center I East Denpasar that was conducted from April-May 2024. There were 142 respondents recruited as sample of the study which were selected through convenience sampling method. The research instruments used were the Multidimensional Health Locus of Control (MHLC) questionnaire and the Summery of Diabetes Self Care Activities (SDSCA) questionnaire. Data were analyzed by using Spearman-rho. Result: The finding showed that the majority of the respondents were female (52.8%) with age range 60-75 years old (49.3%). Based on health locus of control, it was found that health locus of control was high (73.9%), with self-care behavior (69.7%). The Spearman rho test showed that there was a correlation between health locus of control and self-care with (p-value