Zip codes for Dayton, OH, are, according to City-Data: 45377, 45414, 45424, 45426, 45416, 45406, 45405, 45404, 45402, 45403, 45410, 45428, 45417, 45409, 45420 and 45419. Statistics for each of these zip codes are available at City-Data.com.
When including the greater Dayton area, Dayton includes more zip codes. Some of these are: 45458 and 45459 for Centerville, south of the city of Dayton; 45421 for Huber Heights, just north of Dayton; 45430 and 45432 for Beavercreek, which is to the east of the city of Dayton; and 45429 for Kettering, which is just south of Dayton, per OH HomeTown Locator. According to City Population, Dayton is the sixth largest city in Ohio, with a population of approximately 141,000, as of 2014.