This study focused on the development of a culture-based learning package in Ethnomathematical Plane and Solid Geometry based on the ethnomathematical practices of the Ifugaos. Descriptive developmental approach was used to assess the ethnomathematical practices, and the level of validity and readability of the developed learning package. Results revealed that the following ethnomathematical practices are still very much observed by the Ifugaos: festivals and dances, rice farming, musical instruments, ethnic food preparations, basket weaving, and wood carving. The validity of the developed learning package obtained a rating of passed in content, format, presentation, and organization and up-to-datedness of information. The readability statistics showed that the developed learning package is easy to comprehend and suitable to intended readers and learners since it can be understood by at least Grade 7 students. The developed learning package is recommended for use as teaching learning instructional material in Plane and Solid Geometry subject.