13 Internship Advertising jobs in Belleville, Illinois

Updated daily. Most recent posting: September 16, 2026.

Digital Marketing Intern

The Digital Marketing Intern will support SEO efforts, keyword research, and website performance analysis. The role also involves assisting with paid media execution, data reporting, and content creation for landing pages....

Bridgeton, Missouri Hunter Engineering Company
Digital Marketing Intern - Summer 2027

Carboline is seeking a Digital Marketing Intern to support their online presence through website updates, social media initiatives, and digital advertising efforts. The intern will gain hands-on experience in content creation, brand management, and digital strategy while working alongside marketing ...

St. Louis, Missouri Rust-Oleum
Digital Marketing Intern Flexible Schedule & Mentorship

Job DescriptionVIE Media, a forward-thinking digital marketing agency, is offering a unique opportunity for a Digital Marketing Intern to join our team. This internship will provide hands‑on experience in various aspects of digital marketing, including social media, content creation, SEO, and PPC ca...

St. Louis, Missouri VIE Media
Marketing Assistant

The Marketing Assistant is a key contributor to the marketing team, assisting in the planning and rollout of campaigns designed to increase brand visibility, deepen customer engagement, and contribute to revenue growth. Core Responsibilities Take part in on-site marketing and promotional activities ...

Belleville, Illinois Platinum Coastal Group
Marketing Content Creator B2B

Own the content calendar across our LinkedIn / X channels, moving eventually to own our website’s blog, email, and newsletters. Research playbooks, use cases and best practices to augment content quality. Demonstrated experience asking sharp, thoughtful questions that surfaced unique stories, leadin...

St. Louis, Missouri Itlearn360
Digital Marketing Intern

Job Title: Digital Marketing Intern Responsibilities Assist with the creation and management of social media campaigns across various platforms.Help with the setup and management of PPC campaigns.Support the SEO team in keyword research and the optimization of website content.Collaborate with the co...

St. Louis, Missouri VIE Media
Marketing Assistant

The Marketing Assistant is a key contributor to the marketing team, assisting in the planning and rollout of campaigns designed to increase brand visibility, deepen customer engagement, and contribute to revenue growth. Core Responsibilities Take part in on-site marketing and promotional activities ...

St. Charles, Missouri Platinum Coastal Group
Marketing Project Manager

Hours Estimates & Management Develop hours estimates and then manage those estimates through a collaborative process with the account team. Ensure deadlines are met and client deliverables are completed.Track timelines and tasks in project management software. Client & Internal Meetings Facilitate a...

St. Louis, Missouri True Media
Marketing & Paid Media Intern at CBD Kratom Saint Louis, MO

CBD Kratom , aims to include all talent from various backgrounds and cultures. CBD Kratom is a place where anyone can grow and think progressively! We love attracting diverse talent and cultivating an inclusive workspace that fosters different perceptions and individuality. Benefits: Team Memb...

St. Louis, Missouri CBD Kratom
Digital Marketing Intern — Real Client Impact & Mentorship

A dynamic digital marketing agency is seeking a curious intern to join their team. This paid internship focuses on hands-on learning in SEO, paid search, and content creation. Interns will engage in real client work, receive mentorship from experienced professionals, and have opportunities for full-...

St. Louis, Missouri Digital Strike - Targeted Marketing
Marketing Project Manager

Hours Estimates & Management Ensure deadlines are met and client deliverables are completed.Track timelines and tasks in project management software. Client & Internal Meetings Facilitate adherence of the account team to agency roles and processes. Prior work experience in a Project Management/Coord...

St. Louis, Missouri True Media
Intern, Social Media & Event Marketing - NHL

The intern will serve as an integral part of the Communications and Event Marketing team, supporting the business operations of Enterprise Center, Stifel Theatre, and STL Authentics Team Store, while developing skills in a fast‑paced, real‑world setting. Primary focus for this position will be assis...

St. Louis, Missouri St. Louis Blues
Marketing & Business Development Assistant

This is a hybrid-friendly office position with a flexible work schedule and work-from-home opportunities. Business Development Support (30%) Required • 1-3 years of professional experience in marketing, client engagement, business development, or a related field — early-career candidates with a stro...

St. Louis, Missouri Throttlenet
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