The chain won't release sales numbers, but "we can confirm reports that it was a record-setting day," said Steve Robinson, Chick-fil-A's executive vice president of marketing.
The controversy started after an interview with the fast-food restaurant chain's president and COO, Dan Cathy, appeared in The Baptist Press on July 16. He weighed in with his views on family.
"We are very much supportive of the family - the biblical definition of the family unit," Cathy said. "We are a family-owned business, a family-led business, and we are married to our first wives. We give God thanks for that."
On a Facebook page Huckabee created announcing the event, more than 620,000 people said they would participate.
He called for a vocal response to the backlash against the restaurants and their president.
Throngs of people went to Chick-fil-A restaurants across the country Wednesday. Lines snaked around a Chick-fil-A in Dallas, CNN affiliate WFAA reported. Large lines were even seen at the restaurants in Indiana.