Listed Miss Grand International 2018's national representative selection

The 6th edition of the Miss Grand International pageant was held at the One Entertainment Park in Yangon, Myanmar on October 25, 2018, in which candidates from 75 countries and territories participated. These candidates were elected as the country representatives through different methods, such as through the Miss Grand National which was held to select the country representative for Miss Grand International specifically, or appointed by another national pageant organizer, in which the main winner was sent to compete on other international stages. Some of them were assigned as representatives without competing at any national pageant in this particular year.

Overview
As per data collected in the National preliminary contest section, 44 national pageant was held to elect the country representatives for Miss Grand International 2018. 19 of which was the Miss Grand National (A1), while 2 was other national contests that sent their main winners to Miss Grand International 2023 (A2), 14 national contest listed the Miss Grand title as one of the supplement awards (B1), while the remaining 13 contest later appointed its runner-up as Miss Grand National titleholder (B2). All the remaining candidates were either determined through the casting or appointed without participating in any respective national pageants (C1 and C2), such as the representative of Panama.

This year, the Miss Grand National was also held in Azerbaijan, but the organizer, Elxan Pashayev, did not hold the license of Miss Grand International for Azerbaijan.

Three candidates, who were elected as the country representatives through the national pageant, did not enter the international tournament for different reasons, and no replacements were assigned, including the representatives of Bahamas, Namibia, and Singapore.

The representatives of Guatemala and Honduras were also appointed but did not compete for undisclosed reasons, while the representative of Lithuania, Jurate Stasiunaite, withdrew during the international pageant camp for personal reasons.

Five replacements have been observed, including:
 * Albania: The Miss Grand Albania 2018 winner, Dashuria Bilaj, was replaced by an appointed, Klaudia Kalia, after Lens Production lost the franchise to Aleks Fashion Events.
 * Canada: The Miss Grand Canada 2018 winner, Veronica Rodriguez, was replaced by the runner-up, Grace Diamani, for undisclosed reasons.
 * Colombia: Génesis Quintero, the original Miss Grand Colombia 2018, resigned from the title, and Sheyla Quizena was appointed as the replacement.
 * Kosovo: After several conflicts with the national director, the Miss Grand Kosovo 2018 winner, Bernadeta Nikolla, resigned from the title, and Songyl Meniqi was appointed as the replacement.
 * Spain: Mariola Angulo, Miss Grand Spain 2018 winner, resigned from the title for undisclosed reasons, then the first runner-up, Patricia López, was promoted to take over the title and competed internationally as the replacement.

In this edition, a total of 13 countries withdrew, 3 countries debuted, and 10 countries returned, making the total 75 countries that participated. The information is summarized below.

National preliminary contest
The following is a list of Miss Grand International 2018's national preliminary contests, which were categorized by the country representative selection methods.