John Olumba (born July 12, 1981) is an American attorney, politician and Democrat who served two terms as a member of the Michigan State House of Representatives.

After finishing law school in 2007, Olumba worked at a homeless mission, Shelters of Love Inc. and at Starbucks Coffee before seeking office.

As a representative, Olumba's notoriety increased after formally initiating a federal investigation into the offices of Wayne County Executive Robert Ficano and reports of backlash surfaced.

[2] Olumba said he received threatening phone calls and elected officials visited him at his home uninvited in order to coerce him into retracting his investigation.

Toward the end of his first term, Olumba also sought an investigation by the Michigan Attorney General into Detroit Mayor Dave Bing over money he said was misappropriated from two city departments.

Olumba served on the House Judiciary and Commerce Committees in addition to a special subcommittee on Economic Development and Trade.