Bacterial meningitis, including meningococcal infection, posses a serious health problem in Iran. It is still causing morbidity and mortality, particularly during childhood. To clearify the epidemiological & clinical situations of the disease & to obtain abase line data for planning of its control in Iraq, this retrospective study seek to Identify and describe the occurance and distribution of bacterial meningitis in the community in the terms of person, place and time. The Iraq criteria for diagnosis arid case-definition which is relevant to the W.H.O. criteria was used as acut-off point for classification. This study was conducted in Ibn-El-Khateeb hospital Baghdad in (1992). it included all bacterial meningitis cases acJ.mitted to Ibn-El-Khateeb hospital for the period 1986-1990. Local patients records, admission & discharging records, M.O.H. statistical data, C.D.C annual statistical data & Baghdad health governerate's vital & medical statistical data were all used to collect the data needed for this study. The following results were obtained from this study :- 1- There were 1988 (76%), 317(12.6%) and 224(8.8%) of patients with pyogenic, meningococcal and tuberculous meningitis respectively registered for the 5-years period . 2- A change i n the pattern of occurance of meningococcal meningitis outbreaks was occured since 1976. Previously .in epidemic wave occured every 10-12year since 1940.Outbreaks began to occure every 3-6 years. 4-Outbreak of this disease were recorded since 1976. The last one in 1989 as this study showed. It is endemic in the inter-epidemic periods. 3. Haemophilus influenzas and streptococcus pneumontae are common pathogens causing pyogenic meningitis in chidren under lyear of age. It is rarely occured in adult age-groups. The percent of the confirmed cases showed that H.Influenzae and pheumococcal meningitis has (70%) and (44%) for children under 1 years of age respectively .4- meningococcal meningitis affect mainly the age group (1-4) year and (15-45) year. 5. Tuberculous meningitis is the gravest type of meningitis with a high case fatality rate reachs (27.7%)in 1990 it is ***occured in children U5 but adults aged (15-45) year were affected more than the other.age-group . 5- The case fatality rate of meningococcal meningitis was high in children under lyear of age. The same rate for tuberculous and pyogenic meningitis was high in the age -group 46 year and over. 6. The sex ratio show amale preponderance with male/female ratio about 2/1 for all types of meningitis under study .*** uncommonly 7- N. meninyitidis is the only one causing epidemic among the differen bacterial pathogenea causing meningitis.Serogroup- A is predominated in Iraq,although serogruup B and W135 was Isolated in 1990. In 1989 an outbreak occured and out of the (317) total number of patients, 193 (60.8%) were recorded in(1989) with an attack rate of (3.8) per 100,000 Baghdad population. 8- Saddam City, Khahdymia, New Baghdad & Al-Dora were highly endemic area in Baghdad with meningococcal meningitis & ( 38 . 7% ) , ( 34 .5% ) and (26.9%) of casesdue to meningococcal, pyogenic and tuberculous meningitis during the 5-years period respectively were from Saddam City.9.Muthana governerate had the highest attack rate with bacterial' meningitis (i.e.pyogenic & meningococcal meningitis) reach to 37/100,000 annually . Baghdad and Arbil had 10-15/100 , 000 /year . 10-The higliest percentage of referred case from other governerates to Ibn-El-Khateeb.hospital was in tubereulous meningitis cases.It was (32.2%) in comparion to (13.2%) and (13.8%) for meningococcal and pyogenic meningitis respectively .11-The percentage of un-identifed pyogenic meningitis was fairly high (93%) . 12-Meningocooca1 meningitis has amarked seasonality. cases begin to increase in November and December,refich its peak in April then begin to decrease. 13-Appioprate case-finding and case definition , early diagnosis and prompt treatment, aproper recording reporting system, early isolation of the causative agent are essential points to which especial attention is recommended .