The best Craigslist city to get high traffic largely depends on your specific goals and target audience. Craigslist is divided into various local sections, each corresponding to a specific city or region. Here are some factors to consider when choosing a city on Craigslist for high traffic:

1. Population Density: Larger cities and metropolitan areas tend to have more users and, therefore, higher traffic on Craigslist. If your goal is to reach a large and diverse audience, consider major cities like New York City, Los Angeles, Chicago, or Houston.
2. Local Demand: Evaluate the local demand for your products or services. Some items or services may be more in demand in specific regions. For instance, real estate-related ads might perform better in cities with a booming housing market.
3. Competition: In larger cities, you may face more competition from other advertisers. Smaller cities or less competitive niches could provide an opportunity to stand out and get noticed more easily.
4. Niche Markets: Consider whether your business serves a niche market. Some smaller cities might be ideal for niche products or services where there’s a concentrated and highly interested audience.
5. Local Events: If your products or services are tied to local events or activities, it’s beneficial to choose a city where those events occur frequently.
6. Shipping and Location: If your business relies on physical location or proximity, select a city in the region where you operate.
7. Posting Fees: Craigslist may charge fees for certain categories or cities, so take this into account when budgeting for your advertising.
8. Local Regulations: Be aware of any local regulations that might affect your ability to post certain types of ads. Different cities may have different rules.
9. Customer Demographics: Consider the demographics of the city’s population and whether they match your target audience. Some cities may have a higher concentration of specific demographics.
10. Seasonal Factors: Seasonal changes can impact demand for various products or services. For example, cities in regions with extreme weather conditions might have different seasonal trends.
11. Analyzing Craigslist Traffic Data: Craigslist provides some traffic data on its platform. You can analyze this data to see which cities have high user activity. However, keep in mind that this data may not be completely comprehensive.

Ultimately, the best Craigslist city for high traffic depends on your specific business and marketing strategy. It may be beneficial to test multiple cities and analyze the results to determine which location provides the best ROI for your advertising efforts. Additionally, remember that Craigslist’s policies may change, so it’s essential to stay informed about any updates that could impact your advertising strategy.