This paper investigated Administration of secondary education in a dwindling economy and teachers' effectiveness in secondary schools in Rivers State. objectives, six research questions and six corresponding hypotheses guided the work. The design adopted was correlational. 16,680 teachers in the 247 public secondary schools constituted the population of the study, with a sample size of 613 teachers drawn through stratified random sampling technique. A self-styled questionnaire instrument titled “Administration of Secondary Education in Dwindling Economy Questionnaire (ASEDEQ)” and “Teachers' Effectiveness in Secondary Schools in Rivers State (TESSRQ)” was used for data collection. The instrument was validated by experts in educational management and measurement and evaluation from Ignatius Ajuru University of Education. A test re- test was used to ensure its reliability at 0.80 reliability coefficient using SPSS version 25. Out of 613 copies of the questionnaire administered to the respondents, 554 was retrieved and used for the study. The retrieved research questions were answered using the mean and standard deviation. While, Pearson Product Moment Correlation Coefficient statistics was used to test the null hypotheses at 0.05 alpha level of significance. Findings show that there is significant relationship between remuneration, promotion, learning facilities and teachers’ effectiveness in secondary schools in Rivers State. The study therefore, recommended among others, that teachers are the backbone of any nation, Hence, the progress and development of a nation largely depends on its teachers' community because of their noble and massive contributions in nation building. They have remarkable contributions in making and shaping each and every person of the society. Therefore, adequate measures should be put in place to guarantee effectiveness of teachers’ administration.