If you die intestate (without a valid Will) your spouse is entitled to the following percentages of your net probate estate:

Maryland – the surviving spouse takes entire net probate estate unless there are surviving decedents or surviving parents of the decedent;

the surviving spouse takes $15,000 plus one-half of the net probate estate if the decedent is survived by decedents who are not minor children, or by parents of the decedent; and

the surviving spouse takes one-half of the net probate estate if the decedent is survived by his or her minor children.

See MD Code, Estates and Trust Article, Sec. 3-102.

 Virginia – surviving spouse takes entire net probate estate unless there are surviving descendants of the decedent who are not descendants of the surviving spouse, in that event the surviving spouse takes one-third of the net probate estate;

the surviving spouse also has a claim to one-half of the augmented estate if the decedent is not survived by descendants and one-third if the decedent is survived by descendants,

See Va. Code Sec. 64.1-1.

 District of Columbia – D.C. law provides that the surviving spouse or domestic partner, and minor children, are entitled to a reasonable allowance from the probate estate for maintenance during estate administration.  D.C. Code section 19-101.04

The surviving spouse or domestic partner takes the entire net probate estate if the decedent is not survived by descendants or parents;

The surviving spouse or domestic partner takes two-thirds of the net probate estate if the decedent is survived only by descendants who are issue of the decedent and the surviving spouse;

The surviving spouse or domestic partner takes three-fourths of the net probate estate if the decedent is not survived by descendants but is survived by a parent;

The surviving spouse or domestic partner takes one-half of the net probate estate if the decedent is  survived only by descendants who are issue of the decedent and the surviving spouse, and the surviving spouse has other issue; and

The surviving spouse or domestic partner takes one-half of the net probate estate if the decedent is survived by descendants one or more of who are not issue of the surviving spouse.  D.C. Code section 19-302.

            Also in each local jurisdiction there is a statutory preference for the surviving spouse to be the personal representative or executor of the estate.