Portrait
Email
Official URL
https://www.legis.iowa.gov/legislators/legislator?ga=91&personID=10749
Ballotpedia (Candidate)
https://ballotpedia.org/Mark_Costello_(Iowa)
Wikipedia (Candidate)
https://en.wikipedia.org/wiki/Mark_Costello_(Iowa_politician)
FEC / Disclosure
https://www.legis.iowa.gov/docs/publications/PFD/1521774.pdf