Maria Nicole Chappelle-Nadal (born October 3, 1974) is an American politician who served in the Missouri House of Representatives from the 86th district from 2019 to 2021.

[4] Chappelle-Nadal announced her candidacy in the 2024 United States House of Representatives elections in Missouri against incumbent Cori Bush and prosecutor Wesley Bell, asserting that she has more legislative experience than both candidates combined.

[7] She is a former participant in the Sue Shear Institute for Women in Public Life (2004) and the Neighborhood Leadership Academy (2002) at the University of Missouri-St. Louis.

[11] She chose not to run for reelection in 2018 and was succeeded by Democrat Brian Williams, who won a three-way primary and was unopposed in the general election.

The compromise which ended the filibuster "removed language which would have required a judge, not a jury, to review facts in worker discrimination cases.

"[16] In April 2016, Chappelle-Nadal filibustered a bill regarding sales tax by reading "The 50th Law", an autobiography detailing the life and career of rapper 50 Cent.

[18] Individuals living near the West Lake landfill and Coldwater Creek have reported a number of health problems, including cancer and autoimmune diseases.

In 2012, Chappelle-Nadal wrote an article for Patch Media in which she criticized the Environmental Protection Agency for failing to clean up the waste and acknowledge the threat posed by its existence in the West Lake Landfill.

[21] In 2017, Chappelle-Nadal proposed Senate Bill 22 which would create a $12 million buyout program that would purchase homes contaminated with radioactive waste within a radius of the Bridgeton Landfills.

On September 6, 2015, Chappelle-Nadal held her first town hall meeting in St. Louis regarding radioactive waste resulting from processing uranium ore for the Manhattan Project during World War II.

[23] Chappelle-Nadal believes that part of the solution is to convene a congressional investigatory panel focusing on the EPA's inaction on legacy nuclear waste contamination in the St. Louis region.

On August 17, 2017, in response to the Unite the Right rally in Charlottesville, Virginia, Chappelle-Nadal replied to a comment on one of her Facebook posts, writing "I hope Trump is assassinated!"

Chappelle-Nadal worked as a legislative aid to former St. Louis County Council Chair Rita Heard Days November 2020 – August 2022.

Chappelle-Nadal proposed legislation in 2015 to re-examine policies related to use of deadly force and proper legal procedures following officer-involved deaths.