Kindergarten Age Cutoff Dates by State

Every state draws a line on the calendar, and if your child's birthday falls on the wrong side of it, they wait a year. In most states that line sits somewhere between August 1 and September 30, so a child has to turn 5 by then to start kindergarten that fall. A few states are much later than that, a few are earlier, and a few hand the decision to local districts.

If your kid was born in the summer or early fall, you've probably done the math twice and gotten two different answers, because the date that counts is the one your district enforces and not the one on a national list. State law usually sets a floor and districts can be stricter, so treat the table below as a starting point and your school's enrollment office as the last word.

How old does my child have to be?

Five years old, in every state that puts an age in law. The only real question is by what date, and most states use a day in September while about a dozen use August. The outliers stretch from July 1 in West Virginia to January 1 in Vermont, which means a child with a November birthday can be a kindergartner in one state and home for another year one state over.

Read the wording closely, because it isn't always "on or before." Missouri's statute counts a child who "reaches the age of five before the first day of August," so a July 31 birthday makes it and August 1 doesn't. That single day has decided plenty of enrollments, and it's worth confirming with the school instead of assuming.

Kindergarten is the K in K-12, and it's the first grade most states fund and staff like any other, so the cutoff date is a real gate, not a suggestion.

Kindergarten cutoff dates by state

The dates below come from the Education Commission of the States comparison of state K-3 policies, checked against state statute and state education agency guidance where a state has changed its law since. Where a state leaves the date to districts, the table says so instead of putting a number there.

Districts can and do set earlier dates than their state's, and a handful of big-city districts run on their own calendar entirely, so confirm the date with your own district before you plan around it.

States with the latest cutoffs

Vermont is the latest in the country. State law counts any child who turns 5 on or before January 1 following the start of the school year, but districts there can set the bar anywhere between August 31 and January 1, so two Vermont towns can run on dates four months apart.

New York's statewide date is December 1 and districts set their own policies on top of that, with New York City using December 31, meaning every child who turns 5 during the calendar year can start that fall. Maine uses October 15. New Jersey and Colorado both land on October 1, though Colorado districts have been moving their own dates earlier into the summer.

Connecticut used to be the latest of all at January 1. The legislature moved it to September 1 through Public Act 23-208, starting with the 2024-25 school year, and families of younger children can ask in writing for a waiver, which triggers a readiness assessment the school has to carry out.

Michigan sits at September 1 but lets parents enroll a child who turns 5 by December 1 if they file a waiver request. The district gives a readiness recommendation and the parent makes the final call.

States that leave the date to districts

Massachusetts, New Hampshire and Pennsylvania have no single statewide cutoff. Local boards decide, and Pennsylvania only caps how young the child can be, since a district's minimum entry age can't be under 4 years old before the first day of the school term. Most Massachusetts districts use September 1 or October 1, but a family moving one town over can find their child's eligibility changes with the address.

Ohio just changed. Districts there had been admitting children who turned 5 by September 30, and House Bill 114 now requires every district to admit a student who is 5 by the first day of instruction, effective in March 2026. Because start dates vary from district to district, so does the practical cutoff. Ohio parents can also ask for an evaluation if their child turns 5 later in the fall, before January 1.

Is kindergarten required?

Not in most of the country. Seventeen states plus the District of Columbia require children to attend kindergarten, according to the Education Commission of the States, and that list includes Arkansas, Hawaii, Louisiana, Maryland, Nevada, Oklahoma, South Carolina, Tennessee, Virginia and Wisconsin. Several of them build in a way out. South Carolina parents can sign a written election to skip it, and Maryland grants an exemption if the child is in licensed childcare or Head Start.

Everywhere else kindergarten is optional and compulsory school starts later. The starting age runs from 5 to 8 depending on the state, with most states landing on 6. Virginia starts at 5, and Washington is the only state that waits until 8.

Skipping kindergarten is legal in those states, though it can complicate first-grade placement. Delaware and Nevada both want a readiness or developmental assessment before a child who never enrolled in kindergarten can start first grade, and West Virginia uses an entrance test.

Can my child start early?

Usually yes, in some form, though almost no state makes it simple. Most states address early entrance in statute or regulation, and the routes fall into three patterns.

The most common is a readiness assessment run by the district. Tennessee lets a child who turns 5 by September 30 enter if testing shows enough emotional and academic maturity. Wyoming stretches its August 1 date to September 15 for a child who clears a kindergarten readiness assessment. Nebraska allows an October 15 birthday if the family is relocating, the child already started kindergarten somewhere else, or an assessment says the child can handle the work.

The second is a gifted or advanced-learner finding. North Dakota admits children who turn 5 by December 1 if they show superior academic talent plus social and emotional readiness, Louisiana admits children evaluated as gifted, and Texas admits a child who passes the state's third-grade assessment or qualifies under a district's own early-admission policy.

The third one gets the least attention and helps military and relocating families the most. Kansas, Georgia, Mississippi, North Carolina and South Dakota all let a child who already started kindergarten in another state keep going, whether or not that child would have qualified under the new state's date. Georgia's version covers children who turn 5 by December 31 and were enrolled somewhere else.

Hawaii is the strict one. The July 31 cutoff is written into state law and the state says there's no waiver for it.

What does redshirting mean?

Redshirting means holding a child out of kindergarten for a year even though they're old enough to start, usually a summer-birthday boy whose parents would rather he be one of the older kids than the youngest. The term is borrowed from college sports. About 6.2% of the class entering kindergarten in fall 2010 had been delayed a year, 7.2% of boys and 5.2% of girls, according to Diane Whitmore Schanzenbach and Stephanie Howard Larson writing in Education Next.

It's concentrated among families with more money and more schooling. College graduates were roughly twice as likely as high school graduates to redshirt a son, and among summer-born boys with college-educated parents, about one in five was held back a year.

The research on whether it works is mixed, and the pattern that keeps showing up is a fading advantage. Older kindergartners do measurably better at the start, but studies by Todd Elder and Darren Lubotsky, and separately by Elizabeth Cascio and Diane Schanzenbach, found the benefit of being older declines sharply as children move up through the grades and looks gone by high school, when a redshirted 9th grader is at most 7% older than classmates. Elder and Lubotsky traced where the early edge comes from, and it's what children learn before kindergarten, not anything that happens once school starts.

There's also a cost that never shows up in test scores, since a redshirted child spends an extra year in childcare or at home that the family pays for, and starts working a year later. Schanzenbach and Larson's read is that the academic case for redshirting is weak and that a specific child's readiness matters more than the birthday.

What do I need to enroll?

Districts ask for roughly the same short stack of paperwork. Proof of the child's age comes first, usually a certified birth certificate, and a passport or hospital record will often stand in if you don't have one. Then proof that you live inside the district's boundaries, which normally means a lease or mortgage statement plus a recent utility bill in your name.

Immunization records are the third piece, and the required shots are set by your state health department, not by the school, so the list is the same in every district in your state. Some states also want a physical exam, or a dental or vision screening, inside a set window around the first day.

If your child has an IEP or an Individualized Family Service Plan from early intervention, bring it to registration so the school can line up services before day one. If you're not sure whether your child needs an evaluation at all, our guide on how to tell if your child has a learning disability walks through the early signs. Every district posts its own document list and its own cutoff date on its enrollment page, and the date the district posts is the one it will enforce.

Sources
Education Commission of the States: What Is the State's Kindergarten Entrance Date Cutoff? Are There Age Exemptions or Waivers?
Education Commission of the States: Does the State Require Children to Attend Kindergarten?
Education Commission of the States: 50-State Comparison, Free and Compulsory School Age Requirements
Education Next: Is Your Child Ready for Kindergarten? (Schanzenbach and Larson, Summer 2017)
Connecticut State Department of Education: New Kindergarten Age Information