There have been a number of studies investigating how attitudes such as confidence and motivation affect students and their academic achievement. This study assessed the attitudes towards Mathematics and proficiency in Mathematics of Senior High School Students across different strands. The respondents of the study were 868 grade 11 senior high students of Science, Technology, Engineering and Mathematics (STEM), Pre-baccalaureate Maritime (Maritime), Accountancy, Business and Management (ABM), Humanities and Social Sciences (HUMSS), and Technical Vocation and Livelihood (TVL) strands. It aimed to ascertain the selected SHS students' level of Mathematics proficiency and their attitudes towards Mathematics. The Attitudes' Toward Mathematics Inventory (ATMI) was used to measure and determine the students' attitudes in terms of value, enjoyment, motivation, and self-confidence. Mathematics proficiency was based on the core subject, General Mathematics, the content was functions and graph. The two variables were correlated across different strands. To gather the data an Attitude Towards Mathematics Inventory (ATMI) and a teacher-made test were used. ATMI scores indicated that they valued mathematics, but their scores for Self-Confidence, Enjoyment, and Motivation were somewhat negative in attitudes. As a whole, students' across strands showed a negative attitudes towards mathematics. The results indicated that there is a significant relationship between attitudes towards mathematics and proficiency in mathematics. These findings indicate that teacher educators should be aware of Senior High School students across different strands' attitudes and seek to improve them in order to positively influence students' proficiency in mathematics.