| Newspaper | Code |
| Calistoga Free Press | CFP |
| Cloverdale News | CN |
| Cloverdale Reveille | CR |
| Daily Courier | DC |
| Daily Evening Times | DET |
| Daily Morning Times | DMT |
| Daily Republican | DR |
| Democratic Standard | DS |
| Geyserville Gazette | GG |
| Guerneville X-Ray | GX |
| Healdsburg Enterprise | HE |
| Healdsburg Tribune | HT |
| Petaluma Crescent | PC |
| Petaluma Argus | PA |
| Petaluma Courier | PCo |
| Petaluma Daily Argus | PDA |
| Petaluma Daily Courier (same as Daily Courier) | PDC |
| Petaluma Daily Imprint | PDI |
| Petaluma Journal and Argus | PJ&A |
| Petaluma Evening Argus | PEA |
| Petaluma Morning Argus | PMA |
| Petaluma Weekly Argus | PWA |
| Petaluma Weekly Journal and Sonoma County Advertiser | PWJ |
| Press Democrat | PD |
| Russian River Advertiser | RRA |
| Russian River Flag | RRF |
| Sacramento Union | SU |
| Santa Rosa Daily Democrat | DD |
| Santa Rosa Press | SRP |
| Santa Rosa Republican | SRR |
| Santa Rosa Times | SRT |
| Sebastopol Times | ST |
| Sonoma Bulletin | SB |
| Sonoma County Independent | SCI |
| Sonoma County Journal | SCJ |
| Sonoma County Tribune | SCT |
| Sonoma Democrat | SD |
| Sonoma Index | SI |
| Sonoma Index Tribune | SIT |
| Sonoma Valley Republican | SVR |
| Sonoma Weekly Index | SWI |
| Sotoyome Scimitar | SS |
| Sotoyome Sun | Sun |
| Standard | S |
| Weekly News | WN |