Mountainside is a borough in Union County, New Jersey, with a population of approximately 7,020.
Follow Mountainside — get updates on meetings, local news, and more.
Recent News
All news →NewsAPR 23, 2026
Mountainside Restoration Committee’s Annual Spring Plant Sale Returns to Support Local History
Mountainside Restoration Committee’s Annual Spring Plant Sale Returns to Support Local History TAPinto
TAPintoRead article ↗
NewsAPR 17, 2026
Mountainside’s BSA Troop 177 Celebrates 35th Eagle Scout: Frankie Kelly
Mountainside’s BSA Troop 177 Celebrates 35th Eagle Scout: Frankie Kelly TAPinto
TAPintoRead article ↗
NewsAPR 14, 2026
Don't Miss Out - What You Need To Know About Mountainside Recreation Summer 2026
Don't Miss Out - What You Need To Know About Mountainside Recreation Summer 2026 TAPinto
TAPintoRead article ↗
From Our Blog
All posts →
Product
Document Workspace: Upload, Analyze, and Organize Your Municipal Documents
Upload PDFs, DOCX, XLSX, and more. Get AI-powered summaries, municipal data comparisons, and supporting evidence. Organize everything with initiatives and three visibility levels.
Product
The Grant Finder, Rebuilt: Smarter Scoring, Three Finders, and a Pipeline to Track It All
Three dedicated grant finders for towns, nonprofits, and businesses with intelligent matching, SBIR competitive analysis, Kanban pipeline tracking, and calendar sync for deadlines.
Data & Analysis
Best Suburbs of Chicago to Live In 2026 — Data, Not Opinions
We scored 206 Chicago suburbs across fiscal health and quality of life using real municipal data — crime, taxes, schools, pensions, income, homeownership, and environmental quality. Winnetka, Lake Forest, and Glencoe top the list.