Swamp Thing (Volume 1) 20
| Series | Swamp Thing (Volume 1) |
| Number | Vol. 1 #20 |
| Publisher | National Periodical Publications, Inc. |
| Date | 1976-01 |
| Type | Comic Book, Softcover |
| Language | English |
| Artist | Nestor Redondo |
| Assistant Editor | Paul Levitz |
| Editor | Joe Orlando |
| Writer | Gerry Conway |
| Genre | Horror |
| Published in | New York, NY |