If an immigrant overstays his work visa but marries a citizen how long does it take to process the paperwork?

1-5 YEARS DEPENDING ON THE REGION OF THE UNITED STATES WHERE THE COUPLE LIVES.

in Massachusetts, you have to get a lawyer (for it to be easiest adn quickest) and there are cheap places to go to get one. and the lawyer contacts the ins and after 2 months you go to Immigration, wait in a long line with spouse and lawyer and show them proof of marriage and income above the poverty level. then if all goes well, you get working papers. then they will give you a date that you and the spouse will go to your interview for conditional green card, usually 4 months later. and bring your lawyer, proof that it is a real marriage, and you get a 2 year conditional green card. then in 2 years, or usually 90 days before expiration of the card, you two go and apply for the 10 year card.