Informational use only — not legal advice. This page reflects CenterWorth's review of Oregon Department of Early Learning and Care (DELC) regulations as of 2026-08-07. Regulations change. Always confirm current requirements directly with Oregon Department of Early Learning and Care (DELC) before making staffing, licensing, or business decisions.
State-mandated minimum staffing ratios for licensed childcare centers in Oregon, organized by age group with maximum group sizes and official regulatory citations.
State-specific notes:
| Age Group | Min. Staff Ratio | Max Group Size |
|---|---|---|
| 6 weeks to under 24 months | 1:4 | 8 |
| 24 to under 36 months | 1:5 | 10 |
| 36 months to school age | 1:10 | 20 |
| School age | 1:15 | 30 |
"Min. Staff Ratio" means 1 staff member per N children. Both the ratio and group size limits must be satisfied simultaneously where both apply.
In addition to the standard age-group ratios, Oregon regulations specify modified or additional staffing requirements for specific situations. These apply only under the conditions described.
One teacher, aide II, or qualifying aide I may directly supervise the resting area.
No infants are in the resting group; children are sleeping, going to sleep, or waking; supervision requirements are met; enough staff to meet ordinary ratios remain onsite and summonable; and ordinary ratio is restored when two or more children are restless, vocal, off their cot or mat, sitting, or interacting.
Citation: OAR 414-305-0400(7)
Conditional rules apply only in the specific circumstances described. Verify applicability to your facility type and program with Oregon Department of Early Learning and Care (DELC).
Oregon's staffing ratios determine the minimum number of staff members you must have on the floor at any time — which directly sets your labor cost floor. Since payroll typically represents 50–65% of a childcare center's total operating expenses, the ratio requirement for your primary age group is one of the most important numbers in your business model.
For example, if you operate an infant room in Oregon at 1:4and enroll 12 infants, you need at least 3 staff members on the floor at all times. If you expand to 16 infants, your required staff count increases accordingly — and your payroll jumps before you see any additional tuition revenue.
CenterWorth's staffing cost calculator lets you model your Oregon center's exact staffing requirement by age group, enrollment level, and hours of operation — so you can see payroll as a percentage of revenue before you commit to a lease or license.
CenterWorth's Oregon data was compiled from the following official sources. Always verify current rules at the primary source before making operational or legal decisions.
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The stored Oregon certified-center table lists a 1:4 ratio for children from six weeks to under 24 months, with a maximum group size of eight.
The production record lists 1:10 with a maximum group of 20 from 36 months to school age, and 1:15 with a maximum group of 30 for school-age children.
OAR 414-305-0400(7) permits specified qualified staff to supervise a resting area only when all stored conditions are met, including no infants in the group and enough ordinary-ratio staff remaining onsite and summonable.
Treat maximum group size as a separate classroom ceiling from the ratio. Additional staff may satisfy the ratio but do not increase the listed maximum group size.
Enter your center's capacity, enrollment, and tuition to get a complete financial model — including payroll, break-even enrollment, and operating margin — for your Oregon center.
About this data
This page reflects CenterWorth's review of official Oregon Department of Early Learning and Care (DELC) regulations. CenterWorth compiles data exclusively from primary government and regulatory sources — never from secondary aggregators or advocacy estimates. Data is captured as of the date shown and may not reflect subsequent regulatory amendments. This page is for informational and planning purposes only and does not constitute legal advice.