This page provides postcode data for the Gwynedd Welsh preserved county. Gwynedd contains approximately 83,042 households with a population of about 191,561 (2011 census)
| Postcode | Latitude | Longitude | Easting | Northing | Grid reference | Active? |
|---|---|---|---|---|---|---|
| SY20 9TD | 52.653682 | -3.839071 | 275693 | 307805 | SH756078 | Yes |
| SY20 9TE | 52.653819 | -3.838959 | 275701 | 307820 | SH757078 | Yes |
| SY20 9TH | 52.654864 | -3.842891 | 275438 | 307943 | SH754079 | Yes |
| SY20 9TJ | 52.655085 | -3.841814 | 275511 | 307966 | SH755079 | Yes |
| SY20 9TL | 52.655146 | -3.843258 | 275414 | 307975 | SH754079 | Yes |
| SY20 9TN | 52.655296 | -3.843804 | 275377 | 307993 | SH753079 | Yes |
| SY20 9TP | 52.655592 | -3.844607 | 275324 | 308027 | SH753080 | No |
| SY20 9TQ | 52.65533 | -3.843561 | 275394 | 307996 | SH753079 | Yes |
| SY20 9TR | 52.65572 | -3.845056 | 275294 | 308042 | SH752080 | No |
| SY20 9TS | 52.656264 | -3.847637 | 275121 | 308107 | SH751081 | Yes |
| SY20 9TT | 52.656894 | -3.848196 | 275085 | 308178 | SH750081 | Yes |
| SY20 9TW | 52.65539 | -3.844333 | 275342 | 308004 | SH753080 | Yes |
| SY20 9WD | 52.655372 | -3.844332 | 275342 | 308002 | SH753080 | No |
| SY20 9WL | 52.654446 | -3.844914 | 275300 | 307900 | SH752079 | No |