Yes, there are 13 countries without Covid-19 cases as of 30 April 2020.
- North Korea
- Turkmenistan Turkmenistan
- Lesotho
- Solomon Islands
- Vanuatu
- Samoa
- Kiribati
- Federated States of Micronesia
- Tonga
- Marshall Islands
- Palau
- Tuvalu
- Nauru
You can find a daily updated list here on Wikipedia
