The attitude is based on the self-concept or degree to which an individual perceives an integral part of the natural environment and situations with which it is related. Knowledge includes obtaining, analyzing and systematizing an individual from their natural environment, which is an important step for personal understanding and development. The objective of the research was to analyze and relate the environmental knowledge and attitude of 382 people towards urban-sustainable eco-efficiency in the inhabitants of the Chilca district. Two questionnaires [knowledge and attitude] of 23 questions were designed, the interview was personal to 382 people between the ages of 20 and 50 years. The questionnaire presented 5 responses using the Likert scale, the relationship was corroborated by hiring Rho Spearman and t-student statistical hypotheses. Result: The Environmental Knowledge towards Eco-efficiency (267, 290 and 225 has an idea totally in agreement in air and soil, biological diversity and climate change, respectively). The Environmental Attitude towards Eco-efficiency (200, 192 and 191 have an idea that is totally in agreement in their cognitive, affective and conative aspects, respectively). The relationship between K. and A. presents a rho=0.47 being a good relationship, with con t-student=10.35 and α=2.2e-16; affirming that there is a relationship between the environmental attitude and environmental knowledge towards eco-efficiency. The inhabitants of Chilca affirm that knowledge and attitude are important and agree to mitigate, reduce and conserve biodiversity, air, soil and water, climate change from a cognitive, affective and conative perspective, forming an eco-efficient polymathic and environmental psychology for sustainable urban.   Received: 3 October 2021 / Accepted: 26 November 2021 / Published: 3 January 2022