The PSA Population Report — the "pop report" — is a public database showing how many copies of every card PSA has ever graded, and at what grade. It's free. It's authoritative. And it's the single most important data source for any collector serious about value.

This guide shows you how to read it and how to use it.

Where to find it

Go to psacard.com → "Population Report" in the top menu. Search for a card by player, year, brand, or set. You'll land on a page showing the card's full population breakdown.

Anatomy of a pop report entry

Here's a simplified version of what you'll see for the 2018 Topps Update #US1 Ohtani:

GradeTotal
PSA 10 Gem Mint15,847
PSA 9 Mint22,394
PSA 8 NM-MT8,221
PSA 7 NM1,508
PSA 6 or lower891
Total graded48,861

(Note: these are illustrative numbers; the actual pop changes daily.)

Three things matter here:

  1. Total graded population. How many copies exist in graded form. The bigger this number, the more liquid the market — easy to buy, easy to sell.
  2. The pop at each grade. Shows distribution. For most cards, PSA 9s are the largest group, PSA 10s are scarcer.
  3. The gem rate. PSA 10s ÷ total graded = the percentage of submissions that achieve gem mint. For the 2018 Update #US1, it's around 32% — high, meaning the card was well-printed and conditions hold up.

How to use pop data when buying

Question 1: Is this card actually rare?

A "1 of 1" sounds rare. But a card with population 50,000 in PSA 10 isn't rare at all — even though each copy is technically unique. Compare populations across similar cards to understand relative scarcity:

Question 2: Is the gem rate going to compress?

If a card's gem rate is dropping over time (newer submissions getting fewer 10s than older ones), the existing PSA 10 population is becoming relatively more valuable. Look for pop reports that track historical submission data — some third-party tools (GemRate, CardLadder) chart this.

Question 3: Where is the "wall"?

Many cards have a population "wall" — a point where the pop count slows dramatically because most existing copies have already been graded. After that point, supply is essentially fixed. Cards near or past their wall are better long-term holds than cards still getting heavy submissions.

How to use pop data when selling

Time the listing

If you've got a PSA 10 of a card that's been getting heavy submissions lately, the population is growing — meaning supply is increasing while demand stays the same. That puts downward pressure on price. Better to sell sooner.

Conversely, if you've got a card whose population has barely moved for a year, supply is stable. You can be patient and wait for the right buyer.

Price relative to pop, not just last comp

The "last comp" tells you what one buyer paid for one card. The pop report tells you how the broader market looks. If the last comp was $2,000 but there are 50 active listings of the same card and the pop just jumped 200 in a month, $2,000 isn't a reliable price — it's an outlier on a softening market.

Common mistakes when reading pop data

Quick win: Before buying any expensive card, check three things — the PSA pop, the current eBay sold comps over the last 30 days, and the active listing count. If pop is high and rising, comps are flat or down, and active listings exceed monthly sales — that's a buyer's market. Wait, negotiate, or pass.

Tools that build on pop data

For most collectors, the free PSA pop report + eBay sold comps + 130point.com is enough to make informed decisions. The paid tools become worth it when you're managing a portfolio worth six figures.