Nadia Grace Eicher Mejía-Webb (born November 22, 1995) is an American-Ecuadorian model and beauty pageant titleholder who was crowned Miss Universe Ecuador 2025. She will represent Ecuador at the Miss Universe 2025 pageant.

She previously won Miss California USA 2016 and placed in the Top 5 at Miss USA 2016. She also competed at Miss Universe Ecuador 2024, where she was first runner-up.

Nadia Grace Eicher Mejía was born on November 22, 1995 in Diamond Bar, California, United States. She is the daughter of Ecuadorian-born American musician Gerardo, best known for the 1991 hit "Rico Suave", and Kathy Eicher, Miss West Virginia USA 1989. The family appeared on the reality television series Suave Says. She graduated from Diamond Bar High School in 2013.

Mejía began her pageant career as Miss Beverly Hills Teen USA 2013. She competed twice for Miss California Teen USA, placing fourth runner-up in 2013 and reaching the Top 20 in 2014. She later held the title of Miss Malibu USA 2015 and made the Top 20 at Miss California USA 2015.

Representing Corona del Mar, Mejía was crowned Miss California USA 2016 on December 6, 2015. At Miss USA 2016, she was voted Fan Favorite and placed in the Top 5.

In January 2024, Mejía joined the virtual casting for the inaugural Miss Universe Ecuador pageant. She was selected among 25 candidates and later designated as the representative of the Ecuadorian community in the United States. She placed first runner-up.

On July 26, 2025, Mejía represented again the Ecuadorian community in the United States at Miss Universe Ecuador 2025, held at the Palacio de Cristal in Guayaquil. She won the title and will represent Ecuador at Miss Universe 2025 in Thailand.

During the Miss USA 2016 competition, Mejía discussed her experience with anorexia nervosa, which she has addressed publicly in interviews. Her advocacy initiative, titled I Am Enough, focuses on promoting self-acceptance and encouraging young people to embrace their individuality.