Leidseweg is een straat te Oud Ade in de gemeente Kaag en Braassem en is gelegen in de Nederlandse provincie Zuid-Holland.
| Postcode | Huisnummers |
|---|---|
| 2374 AT | 41, 43, 45, 47, 49, 39, 37, 35, 33, 31, 29, 27, 25, 23, 21, 19, 19a, 51, 53, 55, 57, 59, 61, 63; |
| 2374 AR | 5, 7a, 7b, 7, 9, 36a, 36b, 36c, 36d, 36e, 38a, 38, 40a, 40, 42, 44w, 44, 46a, 46b, 46c, 46d, 46; |
| 2374 AS | 17, 17b, 17a, 15, 15a, 13, 13p, 13b, 13a, 11, 11b, 11a; |
| 2374 AN | 30c, 30, 28a, 28, 30a, 30b, 3a, 3m, 3t, 3, 16, 20, 22a, 22, 24, 26a, 26; |
| 2374 AL | 2a, 2, 4a, 4, 6, 14; |
| 2374 AK | 1; |