| Code | Name | Region |
|---|---|---|
| DEJBC | Julbach | BY |
| DEJUE | Julich | NW |
| DE55F | Juliusburg | SH |
| DEJEM | Jemgum | NI |
| DEJEN | Jena | TH |
| DEJNC | Jena-cospeda | TH |
| DE7JG | Jengen | BY |
| DEJCW | Jerichow | ST |
| DE57I | Jersbek | SH |
| DEJER | Jersleben | ST |
| DEJB3 | Jesberg | HE |
| DEJSG | Jeserig | BB |
| DEJWZ | Jesewitz | SN |
| DEJSA | Jessen | ST |
| DEJNZ | Jessenitz | MV |
| DEJEG | Jesteburg | NI |
| DEJES | Jestetten | BW |
| DEJET | Jettenbach | RP |
| DEJTN | Jettingen | BY |
| DEJSH | Jettingen-scheppach | BY |
| DEJTZ | Jetzendorf | BY |
| DE69G | Jevenstedt | SH |
| DEJEV | Jever | NI |
| DEIEA | Isseroda | TH |
| DEIGU | Issigau | BY |
| DEISU | Issum | NW |
| DEITT | Itterbeck | NI |
| DEITG | Ittlingen | BW |
| DEITZ | Itzehoe | SH |
| DEIZD | Itzgrund | BY |
| DE59A | Itzstedt | SH |
| DEJBL | Jabel | MV |
| DEJBO | Jacobsdorf | BB |
| DE76W | Jaderberg | NI |
| DE72S | Jagel | SH |
| DEJTU | Jagsthausen | BW |
| DEJAG | Jagstzell | BW |
| DEJDF | Jahnsdorf | SN |
| DEJNB | Jandelsbrunn | BY |
| DEJWE | Janschwalde | BB |
| DEJHA | Jarchau | NI |
| DEJMN | Jarmen | MV |
| DEJPD | Jarplund | SH |
| DEISL | Insel | ST |
| DEI5H | Insheim | RP |
| DEINN | Insingen | BY |
| DEIZL | Inzell | BY |
| DEINZ | Inzlingen | BW |
| DEIPH | Iphofen | BY |
| DEIPM | Ipsheim | BY |