v3.26.3
Shareholder Report
 6 Months Ended
Aug. 31, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name T. ROWE PRICE STATE TAX-FREE FUNDS, INC.
Entity Central Index Key 0000795384
Entity Investment Company Type N-1A
Document Period End Date Aug. 31, 2026
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
C000005546  
Shareholder Report [Line Items]  
Fund Name Maryland Municipal Money Fund
Class Name Investor Class
Trading Symbol TMDXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Maryland Municipal Money Fund (the "fund") for the period of March 1, 2026 to August 31, 2026.
Additional Information [Text Block] You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
Material Fund Change Notice [Text Block]  
Additional Information Phone Number 1‑800‑638‑5660
Additional Information Email <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
Additional Information Website www.troweprice.com/prospectus
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

Table Summary
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Maryland Municipal Money Fund - Investor Class
$21
0.41%
Expenses Paid, Amount $ 21
Expense Ratio, Percent 0.41%
AssetsNet $ 113,186,000
Holdings Count | Holding 72
Additional Fund Statistics [Text Block]

What are some fund statistics?

Fund Statistics

Table Summary
Total Net Assets (000s)
$113,186
Number of Portfolio Holdings
72
Holdings [Text Block]

Security Allocation (as a % of Net Assets)

Table Summary
Other Municipal Security
52.4%
Variable Rate Demand Notes
50.4
Non-Financial Company Commercial Paper
0.9
Short-Term and Other
-3.7

Top Ten Holdings (as a % of Net Assets)

Table Summary
Montgomery County, Trinity Health Credit Group
8.5%
Maryland Dept. of Housing & Community Dev., Tender Option Bond Trust Receipts
5.4
Maryland HHEFA, Johns Hopkins Health System
4.7
Montgomery County
4.6
Maryland Economic Dev., Howard Hughes Medical Institute
4.6
Maryland HHEFA, Johns Hopkins Univ.
4.6
Maryland HHEFA, Univ. of Maryland Medical System
4.5
Washington Suburban Sanitary Dist., Tender Option Bond Trust Receipts
4.5
Housing Opportunities Commission of Montgomery County, Tender Option Bond Trust Receipts
4.4
Maryland HHEFA, Pooled Loan Program
4.4
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless
C000193184  
Shareholder Report [Line Items]  
Fund Name Maryland Municipal Money Fund
Class Name I Class
Trading Symbol TWNXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Maryland Municipal Money Fund (the "fund") for the period of March 1, 2026 to August 31, 2026.
Additional Information [Text Block] You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
Material Fund Change Notice [Text Block]  
Additional Information Phone Number 1‑800‑638‑5660
Additional Information Email <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
Additional Information Website www.troweprice.com/prospectus
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

Table Summary
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Maryland Municipal Money Fund - I Class
$12
0.24%
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.24%
AssetsNet $ 113,186,000
Holdings Count | Holding 72
Additional Fund Statistics [Text Block]

What are some fund statistics?

Fund Statistics

Table Summary
Total Net Assets (000s)
$113,186
Number of Portfolio Holdings
72
Holdings [Text Block]

Security Allocation (as a % of Net Assets)

Table Summary
Other Municipal Security
52.4%
Variable Rate Demand Notes
50.4
Non-Financial Company Commercial Paper
0.9
Short-Term and Other
-3.7

Top Ten Holdings (as a % of Net Assets)

Table Summary
Montgomery County, Trinity Health Credit Group
8.5%
Maryland Dept. of Housing & Community Dev., Tender Option Bond Trust Receipts
5.4
Maryland HHEFA, Johns Hopkins Health System
4.7
Montgomery County
4.6
Maryland Economic Dev., Howard Hughes Medical Institute
4.6
Maryland HHEFA, Johns Hopkins Univ.
4.6
Maryland HHEFA, Univ. of Maryland Medical System
4.5
Washington Suburban Sanitary Dist., Tender Option Bond Trust Receipts
4.5
Housing Opportunities Commission of Montgomery County, Tender Option Bond Trust Receipts
4.4
Maryland HHEFA, Pooled Loan Program
4.4
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless