This study examined the methods English language teachers use in teaching grammatical structures in public secondary schools in the Riverine Local Government Areas of Rivers State. The descriptive survey research design was adopted for the study. Bonny Local Government Area was purposively selected for the study due to the number of English Language teachers in the secondary schools in the area. All the 35 English language teachers in Bonny LGA took part in the survey, due to the dearth of English language teachers in Rivers State. Two research instruments were used to collect data for the study, which were a questionnaire and an observation schedule. Two research questions and one hypothesis were formulated to guide the study. The hypothesis was tested using the independent sample t-test at the 0.05 level of significance. Results obtained indicated that the methods used mostly by teachers in Bonny Local Government Area to teach grammatical structures were the inductive, deductive and integrative methods. The audiolingual method was the least used by the teachers. The classroom observation also confirmed what the teachers reported in the questionnaire. The findings of the study also revealed that there was no significant difference in the methods used by English language teachers based on qualification. It was recommended among others, that there should be regular updating of teachers’ knowledge through organized workshops and in-service training.