| Competition: | 3. deild karla |
| Season: | 2023 |
| Winners: | Reynir |
| Promoted: | Hvöt Blönduós Reynir |
| Relegated: | KFS Ýmir |
| Prevseason: | 2022 |
| Nextseason: | 2024 |
The 2023 3. deild karla (English: Men's Third Division) was the 69th season of fourth-tier Icelandic football. The season began on 4 May 2023 and finished on 16 September 2023.
Twelve teams contested the league. The title winners (Reynir) and runners-up (Hvöt Blönduós) were promoted to the 2024 2. deild karla. The bottom two teams (KFS and Ymir) were relegated to the 2024 4. deild karla.[1] [2]
| Team | Location | Stadium |
|---|---|---|
| Arbær | Reykjavík (Árbær) | Fylkisvöllur |
| Augnablik | Kópavogsvöllur | |
| Ellíði | Reykjavík (Árbær) | Würth völlurinn |
| Mosfellsbær | Varmárvöllur | |
| Hvöt Blönduós | Blönduós | Blönduósvöllur |
| ÍH | Hafnarfjörður | Skessan |
| Kári | Akranes | Akraneshöllin |
| KFS | Vestmannaeyjar | Týsvöllur |
| Magni | Grenivík | Grenivíkurvöllur |
| Reynir | Brons-völlurinn | |
| Nesfisk-völlurinn | ||
| Ýmir | Kópavogur | Kórinn |
Each team played each other twice (22 matches each), once at home and once away.