The Wisconsin governor also reported owing $10,001 and $15,000 on a Bank of America card at 11.99 percent interest.
Walker reported receiving a $45,000 advance payment for his book, "Unintimidated." He makes $222,899 as governor of Wisconsin.
Sen. Ted Cruz (R-Tex.), whose financial disclosure forms were also released Monday, listed assets between $2.4 and $4.7 million, not including his congressional salary or that of his wife Heidi, a managing director at Goldman Sachs. Cruz reports that his contract with Harper-Collins, which published his book "A Time for Truth" in June, guarantees him at least $318,750 in royalty payments. He reported making between $100,001 and $1 million in royalties for the book.
Neither campaign lists the salaries of the wives of the candidates. Tonette Walker is listed as working at the American Lung Association.
In a Wisconsin disclosure statement released this year, Walker reported owing between $5,000 and $50,000 on a Sears MasterCard in 2014. It is not listed on his presidential disclosure form and it is unclear if he paid down the debt. Walker, in the Wisconsin disclosure, also lists owing Think Bank between $5,000 and $50,000, and Green Tree more than $50,000. Those debts are also not listed on his presidential disclosure form and it is unclear if he paid them down.
"As a public servant, the governor gave back hundreds of thousands of his salary to the taxpayers, and he is a regular American with two kids in college and a small amount of credit card debt," Walker spokeswoman AshLee Strong said in a statement. Walker gave back his $375,070 in salary as Milwaukee County executive, according to PolitiFact.
The FEC does not require presidential candidates to list the value of their homes on financial disclosure forms, and neither Cruz nor Walker did so.
In 2010, Cruz's tax returns list the couple making an adjusted gross income of $2 million; Heidi Cruz was promoted to managing director in 2013 and is on leave as her husband runs for president. Ted Cruz makes $174,000 as a United States senator. Cruz reported owing between $15,001 and $100,000 on an American Express card at 15.24 percent interest and between $10,0001 and $15,000 on a Citi card at $17.99 percent interest. He also reports having a margin loan from Goldman Sachs of between $50,001 and $100,000.
Candidates need to file their financial disclosure forms in order to participate in the first Republican debate on Aug. 6. The forms reveal information about assets and debts, but only give broad monetary ranges.