The 1969–70 FAW Welsh Cup is the 83rd season of the annual knockout tournament for competitive football teams in Wales.
Key
League name pointed after clubs name.
- CCL - Cheshire County League
 
- FL D2 - Football League Second Division
 
- FL D3 - Football League Third Division
 
- FL D4 - Football League Fourth Division
 
- SFL - Southern Football League
 
- WLN - Welsh League North
 
- WLS - Welsh League South
 
Fifth round
Nine winners from the Fourth round and seven new clubs.
| Tie no
 | 
Home
 | 
Score
 | 
Away
 | 
| 1 | 
Chester (FL D4) | 
6–0 | 
Llandudno Borough
 | 
Sixth round
Semifinal
Final
External links
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| Domestic leagues |  | 
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| Domestic cups |  | 
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| League cups |  | 
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| UEFA competitions |  | 
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| Non-UEFA competitions |  | 
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