District of Columbia Daycare Ratios: Staff-to-Child Ratios and Group Sizes by Age

District of Columbia sets center staff-to-child ratios by age in 5-A DCMR 121, which the Office of the State Superintendent of Education (OSSE) administers.

The day schedule is 1:4 for children 0–24 months (maximum group 8), 1:4 at 24–30 months (group 12), 1:8 at 30–48 months (group 16) and 1:10 at 48–60 months (group 20).

Out-of-school-time groups follow a separate line: 1:12 for children under 6 years (group 24) and 1:15 for children 6 and older (group 30).

In the rule's terms, a child development center is a non-residential facility serving more than 12 children; homes run on a different schedule.

The schedule our research records covers birth through 60 months plus out-of-school time, so for a placement those lines do not list, ask OSSE which ratio applies.

Alongside each ratio, 5-A DCMR 121 caps how many children a group may hold: 8 for children 0–24 months, 12 at 24–30 months, 16 at 30–48 months and 20 at 48–60 months.

The out-of-school-time lines carry their own caps: 24 for children under 6 years and 30 for children 6 and older.

Ratio and group size are different limits — the ratio counts children per adult, while the group size is the number of children in the room or group itself.

Both come from the same section of the rule that OSSE administers.

DC is explicit that minimum adult-to-child ratios shall be met at all times, including non-peak hours, during nap or rest periods, and in vehicles during transport — the ratio a room must meet does not drop when children sleep or when the center is off-peak.

The lines our research records for centers set each ratio by a single age band, and they do not include a provision for combining bands into one mixed-age center group, so confirm any mixed-age room plan with OSSE before you build the schedule.

Mixed ages are built into the home schedule instead: a home's ratio depends on how many children in the group are under 2, such as one child under 2 with 1 to 11 children over 2 at 1:6 (maximum 12), or 1:3 with at least 2 caregivers when 3 or 4 children are under 2.

The rule's ratio lines count adults, and DC sets qualification rules for the staff who fill them.

A Teacher — the lead-teacher role in a child development center — must be at least 18 and hold an associate degree or higher in early childhood or a related major, or another degree or 60 credits with at least 12 ECE credits plus one year of supervised experience, among other routes, under 5-A DCMR 165 as amended August 1, 2025.

Health and safety coverage is a staffing constraint in its own right: every staff member must hold current first aid and CPR certification appropriate to the ages served, and at least 2 certified staff must be on the premises at all times.

Our research does not record how DC treats floaters, substitutes or volunteers in ratio, so put those questions to OSSE.

Home capacity runs on different rules from centers.

A Child Development Home may care for up to 6 children, with the caregiver's own children 6 and older not counted, within limits, and an Expanded Child Development Home uses 2 or more caregivers for up to 12 children; a center, by contrast, is non-residential and serves more than 12.

Home ratios turn on how many children under 2 are in the group: one child under 2 with 1 to 11 children over 2 runs at 1:6 with a maximum of 12, while 3 or 4 children under 2 put the home at 1:3 with at least 2 caregivers.

Here is how the numbers convert into headcount on the floor, as an illustration of the rule rather than a staffing plan for any particular center.

Run one room per band at full group size: an infant room of 8 children 0–24 months takes two adults at 1:4; a room of 12 children 24–30 months takes three at 1:4; a preschool room of 16 children 30–48 months takes two at 1:8; and a pre-K room of 20 children 48–60 months takes two at 1:10.

That is nine adults on the floor when all four rooms are open.

Nap does not lighten the count, because the ratio holds through nap and rest periods, non-peak hours and vehicle transport.

Separately from the rooms, DC requires a director on site during peak hours when most children are present, with an authorized representative who meets the director rules (except education), or a teacher with at least 5 years in the role, taking charge when the director is away; our research does not record whether the director counts toward a room's ratio, so ask OSSE when you model coverage.

For out-of-school time — the before- and after-school hours a center runs — DC's center lines are 1:12 for children under 6 years (maximum group 24) and 1:15 for children 6 years and older (group 30).

These are center figures.

The home ratio lines our research records turn on how many children are under 2; that research does not show a school-age line for homes or how school-age children are counted in one, so ask OSSE before you staff a home's after-school hours.

Nor does it record a day-schedule line for children past 60 months in full-day center care, so ask OSSE how a placement above that band is staffed.

OSSE rewrote the child development facility rules comprehensively on December 2, 2016, and amended the staff qualification sections effective August 1, 2025.

The ratio and first aid figures this page uses sit in the 2016 rule text as our October 2026 read of the DC register found them: a proposed rulemaking published May 17, 2024 touched Chapter 1, but our research saw no final change to the ratio section after that proposal.

Confirm the current ratios with OSSE's Division of Early Learning before you staff a room or set a schedule.