Beginning July 1, 2017, Arizona's employees are entitled to earned paid sick time and accrue a minimum of one hour of earned paid sick time for every 30 hours worked, subject to the following limitations:

•  Employees whose employers have less than 15 employees may only accrue or use 24 hours of earned paid sick time per year.
• Employees whose employers have 15 or more employees may only accrue or use 40 hours of earned paid sick time per year. Employers are permitted to select higher accrual and use limits.

See more on Arizona's Earned Paid Sick Time

The Healthy Workplaces, Healthy Families Act of 2014 is the nation's second state-law mandate requiring paid sick leave. Connecticut signed the first paid sick leave into law in 2011. Effective July 1, 2015 California's law requires all employers to provide California employees (with some exceptions) with paid sick leave.  See more at California Sick Leave.

Illinois requires employers to provide employees the ability to use employer provided personal sick leave benefits for absences due to the illness, injury or medical appointment of their immediate family. The Employee Sick Leave Act took effect January 1, 2017.

California Family Rights Act 

California - Paid Family Act 

Connecticut Family and Medical Leave

San Francisco - Family Friendly Workplace Ordinance

Rhode Island - Temporary Caregiver Insurance 

Family Leave Insurance - New Jersey

Washington DC Family and Medical Leave Act

- FLSA: no federal paid sick leave requirements

- FMLA: coverage unpaid leave serious illnesses

- Federal Employees entitled to paid sick leave

- California Paid Sick Leave

- Connecticut Paid Sick Leave

- Massachusetts Paid Sick Leave

- Paid Sick Leave in US Cities

* Sick leave for full-time employees: 1/2 day or 4 hours for each biweekly pay period
Part-time employees: 1 hour for each 20 hours in a pay status;
* there is no limitation on the amount of sick leave that can be accumulated
* Unused sick leave accumulated by employees covered by the Civil Service Retirement System will be used in the calculation of their annuities
*Sick leave usage is unlimited for an employee's own personal medial needs; annual up to 13 days (104 hours) for family care and bereavement; annual up to 12 weeks (480 hours) for a family member with a serious health condition. An employee is entitled to no more than a combined total of 12 weeks of sick leave annually for all family care purposes. Part-time employees are entitled to use the amount of sick leave pro-rated in proportion to the average hours of work per week.

Source: fs.fed.us/global/employee

The Family and Medical Leave Act (FMLA) provides for eligible workers up to 12 weeks of job-protected, unpaid leave during any 12-months period for the following reasons:

1) Birth and care of the eligible worker's child, or placement for adoption or foster care of a child with the worker. 
2) Care of a family member (spouse, child, parent) with a serious health condition
3) Care of the worker's own serious health condition. 

Read in the next link more about the Family and Medical Leave Act

Massachusetts became the 3d state of the nation to guarantee paid sick leave, with voters approving on November 4th 2014 a sick-leave ballot initiative. Under the measure employees can earn one hour of paid sick leave for every 30 hours worked, to be capped at 40 days of leave per calendar year, starting July 1, 2015. Small employers with 10 or fewer workers won't have to provide paid sick leave, but their employees could earn and use up to 40 hours of unpaid sick time. Read more about Massachusetts Paid Sick Leave.

September 2015, President Obama signed Executive Order 13706, “Establishing Paid Sick Leave for Federal Contractors,” which provides up to seven days of paid sick leave annually for federal contractors’ employees who work on federal contracts. The ruling took effect for certain contracts and subcontracts entered January 1, 2017. 

The U.S.is one of the only five countries in the world without a national policy on paid sick days. Besides the US, only Lesotho, Liberia, Papua-New Guinea and Swaziland don't have paid sick leave. Not that we don't want legislation. 86% of the people surveyed in 2008 by the National Research Center at the University of Chicago said they favor a basic labor standard fo paid sick leave.

Vermont passed legislation that will require employers to provide employees with at least 24 hours (or 3 days) of paid sick leave during a 12 month period. After that first year employers will be required to provide employees with 40 hours (or 5 days) of paid sick leave. The new law went into effect on January 1, 2017. Read more on Vermont's Paid Sick Leave.

Washington employees are entitled to at least one hour of paid sick leave for every 40 hours worked, starting January 1, 2018. New hires may be required to wait until 90 days after hire before using accrued leave. Unlike other states, Washington does not place a cap on how much sick leave an employee can accrue or use in a year. However, employees are only entitled to carry over 40 hours of accrued sick leave from year to year. Read more on Washington Paid Sick Leave

Sick leave guarantees you time of to stay home when you're sick without losing your job. Paid sick leave includes also a guarantee of pay during the time you're sick. Sometimes Paid Sick Policies allow paid sick leave to be used to take care for sick family members, to go to medical appointments or to address health and safety needs related to domestic violence or sexual assault.